Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2021	Nov. 01, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Trading Symbol	QRHC
Entity Registrant Name	Quest Resource Holding Corporation
Entity Central Index Key	0001442236
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,020,946
Entity File Number	001-36451
Entity Tax Identification Number	51-0665952
Entity Address, Address Line One	3481 Plano Parkway
Entity Address, City or Town	The Colony
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75056
City Area Code	972
Local Phone Number	464-0004
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common stock
Entity Incorporation, State or Country Code	NV
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 9,100,210	$ 7,516,260
Accounts receivable, less allowance for doubtful accounts of $967,729 and $935,261 as of September 30, 2021 and December 31, 2020, respectively	25,918,812	17,420,889
Prepaid expenses and other current assets	1,462,742	1,069,238
Total current assets	36,481,764	26,006,387
Goodwill	66,794,747	66,310,385
Intangible assets, net	7,263,330	6,528,330
Property and equipment, net, and other assets	3,363,720	3,384,055
Total assets	113,903,561	102,229,157
Current liabilities:
Accounts payable and accrued liabilities	22,106,060	15,246,839
Other current liabilities	1,678,370	1,392,579
Current portion of notes payable	651,800	624,383
Total current liabilities	24,436,230	17,263,801
Notes payable, net	15,877,669	14,948,625
Other long-term liabilities, net	1,608,535	1,973,759
Total liabilities	41,922,434	34,186,185
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized, no shares issued or outstanding as of September 30, 2021 and December 31, 2020
Common stock, $0.001 par value, 200,000,000 shares authorized, 18,802,359 and 18,413,419 shares issued and outstanding as of September 30, 2021 and December 31, 2020	18,802	18,413
Additional paid-in capital	168,130,553	166,424,597
Accumulated deficit	(96,168,228)	(98,400,038)
Total stockholders’ equity	71,981,127	68,042,972
Total liabilities and stockholders’ equity	$ 113,903,561	$ 102,229,157

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 967,729	$ 935,261
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	18,802,359	18,413,419
Common stock, shares outstanding	18,802,359	18,413,419

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 37,366,740	$ 23,701,226	$ 109,326,814	$ 71,002,281
Cost of revenue	30,514,034	19,144,292	89,223,751	57,527,714
Gross profit	6,852,706	4,556,934	20,103,063	13,474,567
Operating expenses:
Selling, general, and administrative	5,307,635	4,290,697	14,630,426	12,677,873
Depreciation and amortization	508,456	150,170	1,324,391	818,060
Total operating expenses	5,816,091	4,440,867	15,954,817	13,495,933
Operating income (loss)	1,036,615	116,067	4,148,246	(21,366)
Other income		149,932		1,408,000
Interest expense	(542,848)	(72,578)	(1,653,987)	(244,123)
Loss on extinguishment of debt		(167,964)		(167,964)
Income before taxes	493,767	25,457	2,494,259	974,547
Income tax expense	108,003	92,046	262,449	63,800
Net income (loss)	385,764	(66,589)	2,231,810	910,747
Deemed dividend for warrant down round feature		(205,014)		(205,014)
Net income (loss) applicable to common stockholders	$ 385,764	$ (271,603)	$ 2,231,810	$ 705,733
Net income (loss) per share applicable to common stockholders
Basic	$ 0.02	$ (0.02)	$ 0.12	$ 0.04
Diluted	$ 0.02	$ (0.02)	$ 0.11	$ 0.04
Weighted average number of common shares outstanding
Basic	18,984,979	17,290,447	18,784,722	16,055,110
Diluted	21,307,854	17,290,447	20,704,270	16,070,275

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2019	$ 61,644,052	$ 15,373	$ 160,858,072	$ (99,229,393)
Beginning Balance, Shares at Dec. 31, 2019		15,372,905
Stock-based compensation	377,317		377,317
Net income (loss)	(231,667)			(231,667)
Ending Balance at Mar. 31, 2020	61,789,702	$ 15,373	161,235,389	(99,461,060)
Ending Balance, Shares at Mar. 31, 2020		15,372,905
Beginning Balance at Dec. 31, 2019	61,644,052	$ 15,373	160,858,072	(99,229,393)
Beginning Balance, Shares at Dec. 31, 2019		15,372,905
Deemed dividend	205,014
Net income (loss)	910,747
Ending Balance at Sep. 30, 2020	66,733,814	$ 18,381	165,239,093	(98,523,660)
Ending Balance, Shares at Sep. 30, 2020		18,381,227
Beginning Balance at Mar. 31, 2020	61,789,702	$ 15,373	161,235,389	(99,461,060)
Beginning Balance, Shares at Mar. 31, 2020		15,372,905
Stock-based compensation	400,361		400,361
Shares issued for Employee Stock Purchase Plan options	30,040	$ 30	30,010
Shares issued for Employee Stock Purchase Plan options, Shares		30,206
Net income (loss)	1,209,003			1,209,003
Ending Balance at Jun. 30, 2020	63,429,106	$ 15,403	161,665,760	(98,252,057)
Ending Balance, Shares at Jun. 30, 2020		15,403,111
Stock-based compensation	323,750		323,750
Release of deferred stock units		$ 28	(28)
Release of deferred stock units, Shares		28,116
Sale of common stock, net of issuance costs	3,047,547	$ 2,950	3,044,597
Sale of common stock, net of issuance costs, Shares		2,950,000
Deemed dividend	205,014		205,014	(205,014)
Net income (loss)	(66,589)			(66,589)
Ending Balance at Sep. 30, 2020	66,733,814	$ 18,381	165,239,093	(98,523,660)
Ending Balance, Shares at Sep. 30, 2020		18,381,227
Beginning Balance at Dec. 31, 2020	68,042,972	$ 18,413	166,424,597	(98,400,038)
Beginning Balance, Shares at Dec. 31, 2020		18,413,419
Stock-based compensation	309,610		309,610
Stock option and warrant exercises	253,389	$ 277	253,112
Stock option and warrant exercises, Shares		276,388
Net income (loss)	1,146,740			1,146,740
Ending Balance at Mar. 31, 2021	69,752,711	$ 18,690	166,987,319	(97,253,298)
Ending Balance, Shares at Mar. 31, 2021		18,689,807
Beginning Balance at Dec. 31, 2020	$ 68,042,972	$ 18,413	166,424,597	(98,400,038)
Beginning Balance, Shares at Dec. 31, 2020		18,413,419
Stock option exercises, Shares	176,427
Net income (loss)	$ 2,231,810
Ending Balance at Sep. 30, 2021	71,981,127	$ 18,802	168,130,553	(96,168,228)
Ending Balance, Shares at Sep. 30, 2021		18,802,359
Beginning Balance at Mar. 31, 2021	69,752,711	$ 18,690	166,987,319	(97,253,298)
Beginning Balance, Shares at Mar. 31, 2021		18,689,807
Stock-based compensation	506,391		506,391
Release of deferred stock units		$ 8	(8)
Release of deferred stock units, Shares		7,742
Stock option and warrant exercises	41,122	$ 19	41,103
Stock option and warrant exercises, Shares		19,167
Shares issued for Employee Stock Purchase Plan options	38,988	$ 23	38,965
Shares issued for Employee Stock Purchase Plan options, Shares		22,937
Net income (loss)	699,306			699,306
Ending Balance at Jun. 30, 2021	71,038,518	$ 18,740	167,573,770	(96,553,992)
Ending Balance, Shares at Jun. 30, 2021		18,739,653
Stock-based compensation	325,739		325,739
Stock option exercises	231,106	$ 62	231,044
Stock option exercises, Shares		62,706
Net income (loss)	385,764			385,764
Ending Balance at Sep. 30, 2021	$ 71,981,127	$ 18,802	$ 168,130,553	$ (96,168,228)
Ending Balance, Shares at Sep. 30, 2021		18,802,359

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ (66,589)	$ 2,231,810	$ 910,747
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	63,089	345,463	164,156
Amortization of intangibles	112,679	1,194,215	707,775
Amortization of debt issuance costs and discounts		615,570	62,684
Provision for doubtful accounts		28,550	90,844
Stock-based compensation		1,141,740	1,101,428
Loss on extinguishment of debt	167,964		167,964
Changes in operating assets and liabilities:
Accounts receivable		(8,440,187)	(1,342,698)
Prepaid expenses and other current assets		(393,504)	(232,639)
Security deposits and other assets		(341,792)	(423,798)
Accounts payable and accrued liabilities		6,698,584	(363,758)
Other liabilities		285,791	2,077
Net cash provided by operating activities		3,366,240	844,782
Cash flows from investing activities:
Purchase of property and equipment		(436,438)	(272,282)
Purchase of intangible assets		(79,215)	(31,485)
Acquisition, net of cash acquired		(2,319,977)
Net cash used in investing activities		(2,835,630)	(303,767)
Cash flows from financing activities:
Proceeds from credit facilities		48,448,941	59,192,785
Repayments of credit facilities		(47,498,738)	(59,664,147)
Repayments of notes payable		(461,468)
Proceeds from stock option exercises		525,617
Proceeds from shares issued for Employee Stock Purchase Plan		38,988	30,040
Proceeds from the sale of common stock, net of issuance costs			3,047,547
Debt issuance costs			(131,328)
Net cash provided by financing activities		1,053,340	2,474,897
Net increase in cash and cash equivalents		1,583,950	3,015,912
Cash and cash equivalents at beginning of period		7,516,260	3,411,108
Cash and cash equivalents at end of period	6,427,020	9,100,210	6,427,020
Supplemental cash flow information:
Cash paid for interest		1,057,476	177,285
Cash paid for income taxes		$ 294,101	147,120
Supplemental non-cash investing and financing activities:
Repayment of Citizens ABL			3,385,560
Debt issuance costs			85,549
Deemed dividend for warrant down round feature	$ 205,014		$ 205,014

The Company and Description of Business

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

The Company and Description of Business

1. The Company and Description of Business

The accompanying condensed consolidated financial statements include the accounts of Quest Resource Holding Corporation (“QRHC”) and its subsidiaries, Quest Resource Management Group, LLC (“Quest”), Landfill Diversion Innovations, LLC (“LDI”), Youchange, Inc. (“Youchange”), Quest Vertigent Corporation (“QVC”), Quest Vertigent One, LLC (“QV One”), and Quest Sustainability Services, Inc. (“QSS”) (collectively, “we,” “us,” “our,” or “our company”).

Operations – We are a national provider of waste and recycling services to customers from across multiple industry sectors that are typically larger, multi-location businesses. We create customer-specific programs and perform the related services for the collection, processing, recycling, disposal, and tracking of waste streams and recyclables.

In March 2020, the World Health Organization categorized Coronavirus Disease 2019 (“COVID-19”) as a pandemic, and the President of the United States declared the COVID-19 outbreak a national emergency. The waste management and recycling services we provide are currently designated an essential critical infrastructure business under the President’s COVID-19 guidance, the continued operation of which is vital for national public health, safety and national economic security. The extent of the impact of the COVID-19 outbreak on our operational and financial performance will depend on certain developments, including the duration and spread of the outbreak, its impact on our customers and subcontractors, and the range of governmental and community reactions to the pandemic, which are uncertain and cannot be fully predicted at this time.

On October 19, 2020, Quest acquired substantially all of the assets used in the business of Green Remedies Waste and Recycling, Inc. (“Green Remedies”), a leading provider of independent environmental services, particularly in multi-family housing, located in Burlington, NC. On June 30, 2021, Quest acquired substantially all of the assets used in the business of an Atlanta-based independent environmental services company. On November 5, 2021, Quest acquired substantially all of the assets used in the business of a Kentucky-based independent environmental services company. See Note 3 for more information regarding the acquisitions.

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Principles of Presentation and Consolidation

The condensed consolidated financial statements included herein have been prepared by us without audit pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and should be read in conjunction with our audited financial statements for the year ended December 31, 2020. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading.

The accompanying condensed consolidated financial statements reflect, in our opinion, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2021 and the results of our operations and cash flows for the periods presented. We derived the December 31, 2020 condensed consolidated balance sheet data from audited financial statements; however, we did not include all disclosures required by GAAP. As QRHC, Quest, LDI, Youchange, QVC, QV One, and QSS each operate as environmental-based service companies, we did not deem segment reporting necessary.

All intercompany accounts and transactions have been eliminated in consolidation. Interim results are subject to seasonal variations, and the results of operations for the nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the full year.

Recent Accounting Pronouncements

Adopted

On January 1, 2021, we adopted Accounting Standards Update (“ASU”) 2019-12, Income Taxes – (Topic 740), which simplifies the accounting for income taxes by removing certain exceptions and amending guidance to improve consistent application of accounting over income taxes. The adoption of the standard did not have a material effect on our consolidated financial statements.

In March 2020, the Financial Accounting Standards Board (the “FASB”) issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This standard provides operational guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting due to the cessation of the London Interbank Offered Rate (“LIBOR”). The amendments are elective and apply to all entities that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. The expedients and exceptions provided by the amendments generally do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. As further discussed in Note 7, our ABL facility

provides procedures for determining a replacement or alternative rate in the event that LIBOR is unavailable. As such, we do not expect the transition away from LIBOR to have a material impact on our consolidated financial statements.

Pending Adoption

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326), which provides guidance on measuring credit losses on financial instruments. The amended guidance replaces current incurred loss impairment methodology of recognizing credit losses when a loss is probable with a methodology that reflects expected credit losses and requires a broader range of reasonable and supportable information to assess credit loss estimates. ASU 2016-13 is effective for us on January 1, 2023. We are assessing the provisions of this amended guidance; however, the adoption of the standard is not expected to have a material effect on our consolidated financial statements.

There have been no other recent accounting pronouncements or changes in accounting pronouncements that have been issued but not yet adopted that are of significance, or potential significance, to us.

Acquisitions

9 Months Ended

Sep. 30, 2021

Business Combinations [Abstract]

Acquisitions

3. Acquisitions

On October 19, 2020, we acquired substantially all of the assets of Green Remedies (the “Green Remedies Assets”) pursuant to the Asset Purchase Agreement (the “Asset Purchase Agreement”), dated as of October 19, 2020, among the Company, Green Remedies and Alan Allred (the “Acquisition”). Green Remedies is a leading provider of independent environmental services, particularly in the multi-family housing market, and is located in Burlington, NC. The Acquisition strengthens our presence across key markets, particularly in multi-family housing. The total purchase price for the Green Remedies Assets was approximately $16.1 million at close, which includes an earn-out estimate tied to future performance over the next three years. We funded the Acquisition primarily with funds pursuant to the Monroe Capital term note, as further discussed in Note 7, which is secured by a first priority lien on substantially all of QRHC’s tangible and intangible assets.

The following table sets forth the purchase price allocation amount of assets acquired and liabilities assumed as of the acquisition date:

Purchase price allocation:
Accounts receivable, net	$	1,331,190
Machinery and equipment		1,270,705
Intangible assets		5,890,000
Goodwill		8,101,895
Current liabilities		(527,907	)
	$	16,065,883

The purchase price was allocated based on an estimate of the fair value of assets acquired and liabilities assumed as of the acquisition date.

Goodwill represents the amount by which the purchase price exceeds the estimated fair value of the net assets acquired and primarily reflects future synergies. The goodwill related to the Green Remedies Assets is deductible for income tax purposes.

Deferred consideration payable to Green Remedies includes (i) $2,684,250 payable in either cash or shares of our common stock at our option, in two equal installments on the first and second anniversaries of the closing date of the Acquisition pursuant to a Consideration Agreement, as defined in the Asset Purchase Agreement; and (ii) an earn-out not to exceed $2,250,000 over an earn-out period, as defined in the Asset Purchase Agreement. We settled the first payment under the Consideration Agreement with the issuance of 218,587 shares of common stock on October 19, 2021. We valued the earn-out liability at $440,000 using a Monte Carlo simulation (a Level 3 measurement under Accounting Standards Codification (“ASC”) 820, Fair Value Measurement). The fair value estimate uses unobservable inputs that reflect our own assumptions as to the performance target benchmarks of the acquired business and discount rates used in the calculation. As the earn-out liability is a contingent consideration arrangement, it is subject to periodic revaluation in accordance with ASC 820. Changes in the estimated fair value of the contingent earn-out consideration would be reflected in our results of operations in the period in which they are identified. We believe the estimated fair value of the earn-out, based on the evaluation of the performance of the acquired business is materially accurate as of September 30, 2021.

The following table presents unaudited pro forma information for the three and nine months ended September 30, 2020 as if the Acquisition had occurred at the beginning of our 2020 fiscal year. The unaudited pro forma information includes adjustments for amortization expense on definite lived intangible assets acquired, interest expense on debt incurred related to the Acquisition, and the related income tax effects.

The unaudited pro forma financial information is presented for informational purposes only and is not necessarily indicative of the operating results or financial position that would have occurred if the Acquisition had been effected on the dates previously set forth, nor is it indicative of the future operating results or financial position in combination.

	Three months ended			Nine months ended
	September 30, 2020			September 30, 2020
	(unaudited)			(unaudited)
Revenue	$	26,800,332		$	80,019,046
Net income (loss)	$	(60,625	)	$	852,674
Income per share - basic and diluted	$	(0.00	)	$	0.05

On June 30, 2021, we acquired substantially all of the assets of an Atlanta-based independent environmental services company. On November 5, 2021, we acquired substantially all of the assets of a Kentucky-based independent environmental services company. Neither acquisition had a material impact on our financial position or results of operations and are not reflected in the above pro forma presentation.

Property and Equipment, Net, and Other Assets

9 Months Ended

Sep. 30, 2021

Property Plant And Equipment [Abstract]

Property and Equipment, Net, and Other Assets

4. Property and Equipment, net, and Other Assets

At September 30, 2021 and December 31, 2020, property and equipment, net, and other assets consisted of the following:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Property and equipment, net of accumulated depreciation of $2,540,661 and $2,195,198 as of September 30, 2021 and December 31, 2020, respectively	$	2,077,981	$	1,987,006
Right-of-use operating lease asset		650,659		1,103,761
Security deposits and other assets		635,080		293,288
Property and equipment, net, and other assets	$	3,363,720	$	3,384,055

We compute depreciation using the straight-line method over the estimated useful lives of the property and equipment. Depreciation expense for the three months ended September 30, 2021 was $119,865, including $74,495 of depreciation expense reflected within “Cost of revenue” in our condensed consolidated statements of operations as it related to assets used in directly servicing customer contracts and was $345,463 for the nine months ended September 30, 2021, including $215,287 of depreciation expense reflected within “Cost of revenue.” Depreciation expense for the three months ended September 30, 2020 was $63,089, including $25,597 of depreciation expense reflected within “Cost of revenue,” and was $164,156 for the nine months ended September 30, 2020, including $53,871 reflected within “Cost of revenue.”

We recorded right-of-use operating lease assets related to our corporate office lease and the office lease space in Burlington, NC in accordance with ASC 842. Refer to Note 8, Leases for additional information.

On February 20, 2018 (the “Closing Date”), we entered into an Asset Purchase Agreement with Earth Media Partners, LLC to sell certain assets of our wholly owned subsidiary, Earth911, Inc., in exchange for a 19% interest in Earth Media Partners, LLC, which was recorded as an investment in the amount of $246,585 as of the Closing Date, and a potential future earn-out amount of approximately $350,000. The net assets sold related to the Earth911.com website business and consisted primarily of the website and its content and customers, deferred revenue, and accounts receivable as of the Closing Date. Earth911, Inc. was subsequently renamed Quest Sustainability Services, Inc. The carrying amount of our investment in Earth Media Partners, LLC is included in “Security deposits and other assets” and we have an accrued receivable in the amount of $333,929 and $259,017 related to the earn-out included as of September 30, 2021 and December 31, 2020, respectively.

Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

5. Goodwill and Other Intangible Assets

The components of goodwill and other intangible assets were as follows:

September 30, 2021 (Unaudited)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net
Finite lived intangible assets:
Customer lists	5 years	$	7,190,000	$	1,125,521	$	6,064,479
Software	7 years		2,215,744		1,515,194		700,550
Trademarks	7 years		426,533		56,565		369,968
Non-compete agreement	3 years		140,000		11,667		128,333
Patents	7 years		230,683		230,683		—
Total finite lived intangible assets		$	10,202,960	$	2,939,630	$	7,263,330

December 31, 2020	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net
Finite lived intangible assets:
Customer lists	5 years	$	5,480,000	$	218,022	$	5,261,978
Software	7 years		2,153,061		1,285,058		868,003
Trademarks	7 years		410,000		11,651		398,349
Patents	7 years		230,683		230,683		—
Total finite lived intangible assets		$	8,273,744	$	1,745,414	$	6,528,330

We compute amortization using the straight-line method over the useful lives of the finite lived intangible assets. Amortization expense related to finite lived intangible assets was $463,087 and $112,679 for the three months ended September 30, 2021 and 2020, respectively. Amortization expense related to finite lived intangible assets was $1,194,215 and $707,775 for the nine months ended September 30, 2021 and 2020, respectively.

We have no indefinite-lived intangible assets other than goodwill. $58.2 million of the goodwill is not deductible for tax purposes, while $8.6 million of goodwill is deductible over its tax-basis life.

We performed our annual impairment analysis for goodwill and other intangible assets in the third quarter of 2021 with no impairment recorded.

Current Liabilities

9 Months Ended

Sep. 30, 2021

Current Liabilities Disclosure [Abstract]

Current Liabilities

6. Current Liabilities

The components of Accounts payable and accrued liabilities were as follows:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Accounts payable	$	18,664,311	$	12,511,678
Accrued taxes		1,195,674		837,443
Employee compensation		1,272,083		1,003,365
Operating lease liability - current portion		681,775		668,019
Other		292,217		226,334
	$	22,106,060	$	15,246,839

Refer to Note 8, Leases for additional disclosure related to the operating lease liability.

The components of Other current liabilities were as follows:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Deferred seller consideration, current	$	1,342,125	$	1,342,125
Deferred revenue		336,245		50,454
	$	1,678,370	$	1,392,579

Refer to Note 3, Acquisitions for additional disclosure related to the deferred seller consideration related to the Acquisition.

Notes Payable and Other Long-Term Liabilities, Net

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Notes Payable and Other Long-Term Liabilities, Net

7. Notes Payable and Other Long-term Liabilities, net

Our debt obligations are as follows:

	Interest Rate	September 30,			December 31,
	(1)	2021			2020
		(Unaudited)
Monroe Term Loan (2)	8.75%	$	11,413,750		$	11,500,000
Green Remedies Promissory Note (3)	3.0%		2,309,032			2,684,250
PNC ABL Facility (4)	3.0%		5,249,535			4,299,333
Total notes payable			18,972,317			18,483,583
Less: Current portion of long-term debt			(651,800	)		(624,383	)
Less: Unamortized debt issuance costs			(1,404,376	)		(1,670,529	)
Less: Unamortized OID			(417,205	)		(494,343	)
Less: Unamortized OID warrant			(621,267	)		(745,703	)
Notes payable, net		$	15,877,669		$	14,948,625
(1) Interest rates as of September 30, 2021
(2) Bears interest at LIBOR rate plus Applicable Margin ranging from 7.5%-10.5%
(3) Stated interest rate of 3.0%, discounted cash flow rate of 13%
(4) Bears interest at a Base rate, as defined, plus a margin of 0.75% to 1.25%

We capitalize financing costs we incur related to implementing our debt arrangements. We record these debt issuance costs associated with our revolving credit facility and our term loan as a reduction of long-term debt, net and amortize them over the contractual life of the related debt arrangements. The table below summarizes changes in debt issuance costs.

	September 30,
	2021
	(Unaudited)
Debt issuance costs
Beginning balance	$	1,670,529
Less: Amortization expense		(266,153	)
Debt issuance costs, net of accumulated amortization	$	1,404,376

Revolving Credit Facility

On August 5, 2020, QRHC and certain of its domestic subsidiaries entered into a Loan, Security and Guaranty Agreement (the “PNC Loan Agreement”), which was subsequently amended on October 19, 2020, with BBVA USA(which was subsequently succeeded in interest by PNC Bank, National Association (“PNC”)), as a lender, and as administrative agent, collateral agent, and issuing bank, which provides for a credit facility (the “ABL Facility”) comprising the following:

•

An asset-based revolving credit facility in the maximum principal amount of $15.0 million with a sublimit for issuance of letters of credit of up to 10% of the maximum principal amount of the revolving credit facility. Each loan under the revolving credit facility bears interest, at the borrowers’ option, at either the Base Rate, plus a margin ranging from 0.75% to 1.25% (3.0% as of September 30, 2021), or the LIBOR Lending Rate for the interest period in effect, plus a margin ranging from 1.75% to 2.25% (no borrowings as of September 30, 2021). The maturity date of the revolving credit facility is April 19, 2025. The revolving credit facility contains an accordion feature permitting the revolving credit facility to be increased by up to $10 million.

•

An equipment loan facility in the maximum principal amount of $2.0 million. Loans under the equipment loan facility may be requested at any time until August 5, 2023. Each loan under the equipment loan facility bears interest, at the borrowers’ option, at either the Base Rate, plus 1.75%, or the LIBOR Lending Rate for the Interest Period in effect, plus 2.75%. The maturity date of the equipment loan facility is April 19, 2025.

The PNC Loan Agreement contains certain financial covenants, including a minimum fixed charge coverage ratio. In addition, the PNC Loan Agreement contains negative covenants limiting, among other things, additional indebtedness, transactions with affiliates, additional liens, sales of assets, dividends, investments and advances, prepayments of debt, mergers and acquisitions, and other matter customarily restricted in such agreements. The PNC Loan Agreement also contains customary events of default, including payment defaults, breaches of representations and warranties, covenant defaults, events of bankruptcy and insolvency, change of control, and failure of any guaranty or security document supporting the PNC Loan Agreement to be in full force and effect. Upon the occurrence of an event of default, the outstanding obligations under the PNC Loan Agreement may be accelerated and become immediately due and payable.

As of September 30, 2021, the ABL Facility borrowing base availability was $15,000,000, of which $5,249,535 principal was outstanding.

LIBOR is expected to be discontinued after 2021. The ABL Facility provides procedures for determining a replacement or alternative rate in the event that LIBOR is unavailable. However, there can be no assurances as to whether such replacement or alternative rate will be more or less favorable than LIBOR. We intend to monitor the developments with respect to the potential phasing out of LIBOR after 2021 and will work with PNC to ensure any transition away from LIBOR will have minimal impact on our financial condition. We however can provide no assurances regarding the impact of the discontinuation of LIBOR on the interest rate that we would be required to pay or on our financial condition.

Monroe Term Loan

On October 19, 2020, QRHC and certain of its domestic subsidiaries entered into a Credit Agreement (the “Credit Agreement”), dated as of October 19, 2020, which was subsequently amended on September 3, 2021, with Monroe Capital Management Advisors, LLC (“Monroe Capital”), as administrative agent for the lenders thereto. Among other things, the Credit Agreement provides for the following:

•

A senior secured term loan facility in the principal amount of $11.5 million. The senior secured term loan at the LIBOR Rate for LIBOR Loans plus the Applicable Margin; provided, that if the provision of LIBOR Loans becomes unlawful or unavailable, then interest will be payable at a rate per annum equal to the Base Rate from time to time in effect plus the Applicable Margin for Base Rate Loans. The maturity date of the term loan facility is October 19, 2025 (the "Maturity Date"). The senior secured term loan will amortize in aggregate annual amounts equal to 1.00% of the original principal amount of the senior secured term loan facility with the balance payable on the Maturity Date. Proceeds of the senior secured term loan were permitted to be used in connection with the Acquisition.

•

A delayed draw term loan facility in the maximum principal amount of $12.5 million. Loans under the delayed draw term loan facility may be requested at any time until November 30, 2021. Pricing and maturity for the outstanding principal amount of the delayed draw term loan shall be the same as for the senior secured term loan. Proceeds of the delayed draw term loan are to be used for Permitted Acquisitions (as defined in the Credit Agreement).

•

An accordion term loan facility in the maximum principal amount of $40.0 million. Loans under the accordion loan facility may be requested at any time until the Maturity Date. Each accordion term loan shall be on the same terms as those applicable to the senior secured term loan. Proceeds of accordion term loans are permitted to be used for Permitted Acquisitions.

The Credit Agreement contains certain financial covenants, including a minimum fixed charge coverage ratio and a senior net leverage ratio. In addition, the Credit Agreement contains negative covenants limiting, among other things, additional indebtedness, transactions with affiliates, additional liens, sales of assets, dividends, investments and advances, prepayments of debt, mergers and acquisitions, and other matters customarily restricted in such agreements. The Credit Agreement also contains customary events of default, including payment defaults, breaches of representations and warranties, covenant defaults, events of bankruptcy and insolvency, change of control, and failure of any guaranty or security document supporting the Credit Agreement to be in full force and effect. Upon the occurrence of an event of default, the outstanding obligations under the Credit Agreement may be accelerated and become immediately due and payable.

At the same time as the borrowing of the $11.5 million under the Credit Agreement, in a separate agreement, we issued Monroe Capital a warrant to purchase 500,000 shares of QRHC’s common stock exercisable immediately. For the $12.5 million delayed draw term loan facility, we will issue a separate warrant to purchase 350,000 shares upon drawing on this facility or on November 30, 2021, whichever occurs first, or upon certain other events. Both warrants have an exercise price of $1.50 per share and an expiration date of March 19, 2028. We estimated the value of the 500,000-share warrant issued using the Black Scholes option pricing model and recorded a debt discount of approximately $766,000 which is being amortized over the term of the Credit Agreement. We also executed a letter agreement that provides that the warrant holder will receive minimum net proceeds of $1 million less any net proceeds received from the sale of the warrant shares, which is conditional on the full exercise and sale of all the warrant shares at the same time and upon a date two years after the closing date of the agreement.

Green Remedies Promissory Note

On October 19, 2020, we issued an unsecured subordinated promissory note to Green Remedies in the aggregate principal amount of $2,684,250, payable commencing on January 1, 2021 in quarterly installments through October 1, 2025 and subject to an interest rate of 3.0% per annum.

Interest Expense

The amount of interest expense related to borrowings for the three months ended September 30, 2021 and 2020 was $334,946 and $56,845, respectively. The amount of interest expense related to borrowings for the nine months ended September 30, 2021 and 2020 was $1,030,377 and $181,439, respectively. Debt issuance costs of $1,757,856 are being amortized to interest expense over the lives of the related debt arrangements. As of September 30, 2021, the unamortized portion of the debt issuance costs was $1,404,376. The amount of interest expense related to the amortization of debt issuance costs for the nine months ended September 30, 2021 and 2020

was $266,153 and $62,684, respectively. Debt discount (“OID”) of $1,674,178 is being amortized to interest expense over the lives of the related debt and consideration arrangements. As of September 30, 2021, the unamortized portion of OIDs was $1,246,726. The amount of interest expense related to the amortization of OID costs for the nine months ended September 30, 2021 and 2020 is $349,418 and nil, respectively.

Other long-term liabilities, net

	September 30,		December 31,
	2021		2020
	(Unaudited)
Deferred seller consideration, net	$	1,133,872	$	986,028
Deferred consideration - earn-out		440,000		440,000
Operating lease liability - long-term portion		30,497		543,564
Other		4,166		4,167
	$	1,608,535	$	1,973,759

We recorded deferred consideration in connection with the Acquisition as further described in Note 3. At September 30, 2021 and December 31, 2020 the unamortized portion of OID on the deferred consideration was $208,253 and $356,097, respectively. The non-current portion of deferred consideration payable to Green Remedies is payable in either cash or shares of our common stock at our option. The earn-out is not to exceed $2,250,000 over an earn-out period, as defined in the Asset Purchase Agreement. We valued the earn-out liability at $440,000 using a Monte Carlo simulation.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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+ Details

Leases

9 Months Ended

Sep. 30, 2021

Lessee Disclosure [Abstract]

Leases

8. Leases

We lease corporate office space in The Colony, Texas under an 84-month, non-cancelable operating lease. Upon the adoption of ASC 842 on January 1, 2019, we recorded approximately $2.0 million and $2.2 million to record the operating lease right-of-use asset and the related liabilities, respectively. Our office lease had a remaining term of 1.0 year as of September 30, 2021, and we used an effective interest rate of 2.456%, which was our incremental borrowing rate in effect at the inception of the lease as our lease does not provide a readily determinable implicit rate.

In connection with our acquisition of the Green Remedies Assets, we entered into a lease for office space in Burlington, NC. We recorded a right-of-use asset associated with this lease of approximately $80,000. The lease expires in October 2023. This office lease had a remaining term of 2.1 years as of September 30, 2021, and we used an effective interest rate of 9.50%, which was our incremental borrowing rate in effect at the inception of the lease as our lease does not provide a readily determinable implicit rate. This lease may be terminated under certain conditions as defined in the lease agreement. The lessor is a related party that is owned by the shareholder of Green Remedies and is employed by us.

The future minimum lease payments required under our office leases as of September 30, 2021 are as follows:

	Amount
2021	$	173,700
2022		528,750
2023		24,513
Total lease payments		726,963
Less: Interest		(14,691	)
Present value of lease liabilities	$	712,272

Balance Sheet Classification

The table below presents the lease related assets and liabilities recorded on the balance sheet. Right-of-use assets and related liabilities related to finance leases at September 30, 2021 are de minimis.

	September 30,		December 31,
	2021		2020
Operating Leases:	(Unaudited)
Right-of-use operating lease asset:
Property and equipment, net and other assets	$	650,659	$	1,103,761

Lease Liabilities:
Accounts payable and accrued liabilities	$	681,775	$	668,019
Other long-term liabilities		30,497		543,564
Total operating lease liabilities	$	712,272	$	1,211,583

Lease Costs

For the three and nine months ended September 30, 2021, we recorded approximately $158,000 and $475,000, respectively, of fixed cost operating lease expense. For the three and nine months ended September 30, 2020, we recorded approximately $150,000 and $450,000, respectively, of fixed cost operating lease expense. Our operating lease expense is offset by a minimum annual incentive received from a local Economic Development Council, which is accrued monthly and will continue over the term of the corporate office lease through August 2022. This minimum annual incentive is $93,600 effective September 2020 through the remainder of the lease term.

Effective December 1, 2019, we subleased a portion of our corporate office space to a single tenant. The sublease agreement is accounted for as an operating lease and we recognize sublease income as an offset to operating lease expense on a straight-line basis over the term of the sublease agreement through August 2022. Sublease income, net of amortized leasing costs, for the nine months ended September 30, 2021 was approximately $39,000.

Cash paid for operating leases approximated operating lease expense and non-cash right of use asset amortization for the nine months ended September 30, 2021 and 2020. We did not obtain any new operating lease right-of-use assets in the nine months ended September 30, 2021.

Revenue

9 Months Ended

Sep. 30, 2021

Revenue From Contract With Customer [Abstract]

Revenue

9. Revenue

Operating Revenues

We provide businesses with services to reuse, recycle, and dispose of a wide variety of waste streams and recyclables generated by their operations. Service revenues are primarily generated from fees charged for our collection, transfer, disposal and recycling services and from sales of commodities by our recycling operations. In addition, we have product sales and other revenue primarily from sales of products such as antifreeze and windshield washer fluid, as well as minor ancillary services.

Revenue Recognition

We recognize revenue as services are performed or products are delivered. For example, we recognize revenue as waste and recyclable material are collected or when products are delivered. We recognize revenue net of any contracted pricing discounts or rebate arrangements.

We generally recognize revenue for the gross amount of consideration received as we are generally the primary obligor (or principal) in our contracts with customers as we hold complete responsibility to the customer for contract fulfillment. We record amounts collected from customers for sales tax on a net basis.

Disaggregation of Revenue

The following table presents our revenue disaggregated by source. Two customers accounted for 39.4% of revenue for the three months ended September 30, 2021, and three customers accounted for 49.4% of revenue for the three months ended September 30, 2020. Two customers accounted for 43.8% of revenue for the nine months ended September 30, 2021, and three customers accounted for 52.0% of revenue for the nine months ended September 30, 2020. We operate primarily in the United States, with minor services in Canada.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(Unaudited)				(Unaudited)
Revenue Type:
Services	$	35,267,085	$	21,554,215	$	102,567,569	$	64,539,439
Product sales and other		2,099,655		2,147,011		6,759,245		6,462,842
Total revenue	$	37,366,740	$	23,701,226	$	109,326,814	$	71,002,281

Contract Balances

Our incremental direct costs of obtaining a customer contract are generally deferred and amortized to selling, general, and administrative expense or as a reduction to revenue (depending on the nature of the cost) over the estimated life of the customer contract. We classify our contract acquisition costs as current or noncurrent based on the timing of when we expect to recognize the amortization and are included in other assets.

As of September 30, 2021 and December 31, 2020, we had $60,000 and $100,000 of deferred contract costs, respectively. During the three and nine months ended September 30, 2021, we amortized $50,000 and $150,000, respectively, of deferred contract costs to selling, general, and administrative expense. During the three and nine months ended September 30, 2020, we amortized $52,500 and $161,250, respectively, of deferred contract costs to selling, general, and administrative expense.

We bill certain customers in advance, and, accordingly, we defer recognition of related revenues as a contract liability until the services are provided and control is transferred to the customer. As of September 30, 2021 and December 31, 2020, we had $336,245 and $50,454, respectively, of deferred revenue which was classified in “Other current liabilities.”

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Income Taxes

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Income Taxes

10. Income Taxes

Our statutory income tax rate is anticipated to be 27%. We had income tax expense of $262,449 and $63,800 for the nine months ended September 30, 2021 and 2020, respectively, which was attributable to state tax obligations based on current estimated state tax apportionments for states with no net operating loss carryforwards, and the reserve against the benefit of the net operating losses at the federal level.

We compute income taxes using the asset and liability method in accordance with FASB ASC Topic 740, Income Taxes. Under the asset and liability method, we determine deferred income tax assets and liabilities based on the differences between the financial reporting and tax bases of assets and liabilities and measure them using currently enacted tax rates and laws. We provide a valuation allowance to reduce the amount of deferred tax assets that, based on available evidence, is more likely than not to be realized. Realization of our net operating loss carryforward was not reasonably assured as of September 30, 2021 and December 31, 2020, and we had recorded a valuation allowance of $11,087,000 and $12,533,000, respectively, against deferred tax assets in excess of deferred tax liabilities in the accompanying condensed consolidated financial statements. As of September 30, 2021 and December 31, 2020, we had federal income tax net operating loss carryforwards of approximately $10,200,000 and $14,500,000, respectively, which expire at various dates ranging from 2032-2037.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

11. Fair Value of Financial Instruments

Our financial instruments consist primarily of cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities, deferred revenue, and notes payable. We do not believe that we are exposed to significant interest, currency, or credit risks arising from these financial instruments. The fair values of these financial instruments approximate their carrying values, based on their short maturities or, for notes payable, based on borrowing rates currently available to us for loans with similar terms and maturities. Contingent liabilities are measured at fair value on a recurring basis. The fair value measurements are generally determined using unobservable inputs and are classified within Level 3 of the fair value hierarchy. See discussion of the contingent earn-out liability in Note 3, Acquisitions.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Stockholders' Equity

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Stockholders' Equity

12. Stockholders’ Equity

Preferred Stock – Our authorized preferred stock consists of 10,000,000 shares of preferred stock with a par value of $0.001, of which no shares have been issued or are outstanding.

Common Stock – Our authorized common stock consists of 200,000,000 shares of common stock with a par value of $0.001, of which 18,802,359 and 18,413,419 shares were issued and outstanding as of September 30, 2021 and December 31, 2020, respectively.

Employee Stock Purchase Plan – On September 17, 2014, our stockholders approved our 2014 Employee Stock Purchase Plan (as amended, the “ESPP”). On May 14, 2021, we issued 22,937 shares to employees for $38,988 under our ESPP for options that vested

and were exercised. We recorded expense of $24,586 and $25,280 related to the ESPP for the nine months ended September 30, 2021 and 2020, respectively.

Warrants –

Warrant activity for the nine months ended September 30, 2021 was as follows:

	Warrants
						Weighted-
						Average
	Number			Exercise Price		Exercise Price
	of Shares			per Share		Per Share
Outstanding at December 31, 2020		1,021,060		$1.15 — $3.88		$	1.56
Exercised		(181,834	)	$1.15 — $3.88		$	1.23
Canceled/Forfeited		(339,226	)	$1.15 — $3.88		$	1.83
Outstanding at September 30, 2021		500,000			$1.50	$	1.50

The following table summarizes the warrants issued and outstanding as of September 30, 2021:

Date of

Shares of

Description

Issuance

Expiration

Exercise Price

Common Stock

Exercisable Warrants

10/19/2020

03/19/2028

$

1.50

500,000

Stock Options – We recorded stock option expense of $575,437 and $878,405 for the nine months ended September 30, 2021 and 2020, respectively. The following table summarizes the stock option activity for the nine months ended September 30, 2021:

	Stock Options
					Weighted-
				Exercise	Average
	Number			Price Per	Exercise Price
	of Shares			Share	Per Share
Outstanding at December 31, 2020		3,177,942		$1.17 — $23.20	$	2.78
Granted		241,063		$3.01 — $3.98	$	3.85
Exercised		(176,427	)	$1.48 — $6.40	$	2.98
Cancelled/Forfeited		(27,743	)	$1.48 — $16.80	$	7.62
Outstanding at September 30, 2021		3,214,835		$1.17 — $23.20	$	2.81

Deferred Stock Units – Effective September 1, 2019, nonemployee directors can elect to receive all or a portion of their annual retainers in the form of deferred stock units (“DSUs”). The DSUs are recognized at their fair value on the date of grant. Each DSU represents the right to receive one share of our common stock following the completion of a director’s service. During the nine months ended September 30, 2021, we granted 81,249 DSUs and recorded director compensation expense of $384,708 related to the grants. In addition, during the nine months ended September 30, 2021 we granted 49,775 DSUs to executive employees and recorded compensation expense of $157,009, which includes an accrual of anticipated bonus expense to be paid in DSUs for certain executive employees. During the nine months ended September 30, 2020, we granted 41,719 DSUs and recorded director compensation expense of $63,234 related to the grants. In addition, during the nine months ended September 30, 2020, we granted 39,684 DSUs to executive employees and recorded compensation expense of $134,509. We had 196,513 and 73,231 DSUs outstanding at September 30, 2021 and December 31, 2020, respectively.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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+ Details

Net Income per Share

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Net Income per Share

13. Net Income per Share

We compute basic net income per share using the weighted average number of shares of common stock outstanding plus the number of common stock equivalents for DSUs during the period. We compute diluted net income per share using the weighted average number of shares of common stock outstanding during the period, adjusted for the dilutive effect of common stock equivalents. In periods where losses are reported, the weighted average number of shares of common stock outstanding excludes common stock equivalents because their inclusion would be anti-dilutive. Dilutive potential common shares consist of the incremental common shares issuable upon the exercise of outstanding stock options, warrants and shares issued pursuant to a Consideration Agreement as discussed in Note 3. Dilutive potential securities are excluded from the computation of earnings per share if their effect is antidilutive. The dilutive effect of outstanding stock options and warrants is reflected in diluted earnings per share by application of the treasury stock method.

The computation of basic and diluted net income per share attributable to common stockholders is as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
	2021		2020			2021		2020
	(Unaudited)					(Unaudited)
Numerator:
Net income (loss)	$	385,764	$	(66,589	)	$	2,231,810	$	910,747
Deemed dividend for warrant down round provision		—		(205,014	)		—		(205,014	)
Net income (loss) applicable to common stockholders	$	385,764	$	(271,603	)	$	2,231,810	$	705,733
Denominator:
Weighted average common shares outstanding, basic		18,984,979		17,290,447			18,784,722		16,055,110
Effect of dilutive common shares		2,322,875		—			1,919,548		15,165
Weighted average common shares outstanding, diluted		21,307,854		17,290,447			20,704,270		16,070,275
Net income (loss) per share:
Basic	$	0.02	$	(0.02	)	$	0.12	$	0.04
Diluted	$	0.02	$	(0.02	)	$	0.11	$	0.04
Anti-dilutive securities excluded from diluted net income per share:
Stock options		413,518		3,222,875			151,018		3,207,710
Warrants		—		521,060			—		521,060
Total anti-dilutive securities excluded from net income per share		413,518		3,743,935			151,018		3,728,770

Subsequent Events

9 Months Ended

Sep. 30, 2021

Subsequent Events [Abstract]

Subsequent Events

14. Subsequent Events

On October 21, 2021, we issued 218,587 shares of common stock to Green Remedies pursuant to that certain Consideration Agreement, dated October 19, 2020, between QRHC and Green Remedies, entered into in connection with the Acquisition. This issuance reflects the first of two equal installments payable to Green Remedies in either cash or shares of QRHC’s common stock, at our option, on the first and second anniversaries of the closing date of the Acquisition.

On November 5, 2021, Quest acquired substantially all of the assets of a Kentucky-based independent environmental services company, which did not have a material impact on our financial position or results of operations.

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2021
Accounting Policies [Abstract]
Principles of Presentation and Consolidation	Principles of Presentation and Consolidation The condensed consolidated financial statements included herein have been prepared by us without audit pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and should be read in conjunction with our audited financial statements for the year ended December 31, 2020. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in our opinion, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2021 and the results of our operations and cash flows for the periods presented. We derived the December 31, 2020 condensed consolidated balance sheet data from audited financial statements; however, we did not include all disclosures required by GAAP. As QRHC, Quest, LDI, Youchange, QVC, QV One, and QSS each operate as environmental-based service companies, we did not deem segment reporting necessary. All intercompany accounts and transactions have been eliminated in consolidation. Interim results are subject to seasonal variations, and the results of operations for the nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the full year.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted On January 1, 2021, we adopted Accounting Standards Update (“ASU”) 2019-12, Income Taxes – (Topic 740), which simplifies the accounting for income taxes by removing certain exceptions and amending guidance to improve consistent application of accounting over income taxes. The adoption of the standard did not have a material effect on our consolidated financial statements. In March 2020, the Financial Accounting Standards Board (the “FASB”) issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This standard provides operational guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting due to the cessation of the London Interbank Offered Rate (“LIBOR”). The amendments are elective and apply to all entities that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. The expedients and exceptions provided by the amendments generally do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022. As further discussed in Note 7, our ABL facility provides procedures for determining a replacement or alternative rate in the event that LIBOR is unavailable. As such, we do not expect the transition away from LIBOR to have a material impact on our consolidated financial statements. Pending Adoption In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326), which provides guidance on measuring credit losses on financial instruments. The amended guidance replaces current incurred loss impairment methodology of recognizing credit losses when a loss is probable with a methodology that reflects expected credit losses and requires a broader range of reasonable and supportable information to assess credit loss estimates. ASU 2016-13 is effective for us on January 1, 2023. We are assessing the provisions of this amended guidance; however, the adoption of the standard is not expected to have a material effect on our consolidated financial statements. There have been no other recent accounting pronouncements or changes in accounting pronouncements that have been issued but not yet adopted that are of significance, or potential significance, to us.

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2021

Business Combinations [Abstract]

Schedule of Purchase Price Allocation Amount of Assets Acquired and Liabilities Assumed

The following table sets forth the purchase price allocation amount of assets acquired and liabilities assumed as of the acquisition date:

Purchase price allocation:
Accounts receivable, net	$	1,331,190
Machinery and equipment		1,270,705
Intangible assets		5,890,000
Goodwill		8,101,895
Current liabilities		(527,907	)
	$	16,065,883

Schedule of Unaudited Pro Forma Information

The unaudited pro forma financial information is presented for informational purposes only and is not necessarily indicative of the operating results or financial position that would have occurred if the Acquisition had been effected on the dates previously set forth, nor is it indicative of the future operating results or financial position in combination.

	Three months ended			Nine months ended
	September 30, 2020			September 30, 2020
	(unaudited)			(unaudited)
Revenue	$	26,800,332		$	80,019,046
Net income (loss)	$	(60,625	)	$	852,674
Income per share - basic and diluted	$	(0.00	)	$	0.05

Property and Equipment, Net, and Other Assets (Tables)

9 Months Ended

Sep. 30, 2021

Property Plant And Equipment [Abstract]

Components Property and Equipment, Net, and Other Assets

At September 30, 2021 and December 31, 2020, property and equipment, net, and other assets consisted of the following:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Property and equipment, net of accumulated depreciation of $2,540,661 and $2,195,198 as of September 30, 2021 and December 31, 2020, respectively	$	2,077,981	$	1,987,006
Right-of-use operating lease asset		650,659		1,103,761
Security deposits and other assets		635,080		293,288
Property and equipment, net, and other assets	$	3,363,720	$	3,384,055

Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

The components of goodwill and other intangible assets were as follows:

September 30, 2021 (Unaudited)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net
Finite lived intangible assets:
Customer lists	5 years	$	7,190,000	$	1,125,521	$	6,064,479
Software	7 years		2,215,744		1,515,194		700,550
Trademarks	7 years		426,533		56,565		369,968
Non-compete agreement	3 years		140,000		11,667		128,333
Patents	7 years		230,683		230,683		—
Total finite lived intangible assets		$	10,202,960	$	2,939,630	$	7,263,330

December 31, 2020	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net
Finite lived intangible assets:
Customer lists	5 years	$	5,480,000	$	218,022	$	5,261,978
Software	7 years		2,153,061		1,285,058		868,003
Trademarks	7 years		410,000		11,651		398,349
Patents	7 years		230,683		230,683		—
Total finite lived intangible assets		$	8,273,744	$	1,745,414	$	6,528,330

Schedule of Changes in Goodwill

Current Liabilities (Tables)

9 Months Ended

Sep. 30, 2021

Current Liabilities Disclosure [Abstract]

Components of Accounts Payable and Accrued Liabilities

The components of Accounts payable and accrued liabilities were as follows:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Accounts payable	$	18,664,311	$	12,511,678
Accrued taxes		1,195,674		837,443
Employee compensation		1,272,083		1,003,365
Operating lease liability - current portion		681,775		668,019
Other		292,217		226,334
	$	22,106,060	$	15,246,839

Components of Other Current Liabilities

The components of Other current liabilities were as follows:

	September 30,		December 31,
	2021		2020
	(Unaudited)
Deferred seller consideration, current	$	1,342,125	$	1,342,125
Deferred revenue		336,245		50,454
	$	1,678,370	$	1,392,579

Notes Payable and Other Long-Term Liabilities, Net (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of Debt Obligations

Our debt obligations are as follows:

	Interest Rate	September 30,			December 31,
	(1)	2021			2020
		(Unaudited)
Monroe Term Loan (2)	8.75%	$	11,413,750		$	11,500,000
Green Remedies Promissory Note (3)	3.0%		2,309,032			2,684,250
PNC ABL Facility (4)	3.0%		5,249,535			4,299,333
Total notes payable			18,972,317			18,483,583
Less: Current portion of long-term debt			(651,800	)		(624,383	)
Less: Unamortized debt issuance costs			(1,404,376	)		(1,670,529	)
Less: Unamortized OID			(417,205	)		(494,343	)
Less: Unamortized OID warrant			(621,267	)		(745,703	)
Notes payable, net		$	15,877,669		$	14,948,625
(1) Interest rates as of September 30, 2021
(2) Bears interest at LIBOR rate plus Applicable Margin ranging from 7.5%-10.5%
(3) Stated interest rate of 3.0%, discounted cash flow rate of 13%
(4) Bears interest at a Base rate, as defined, plus a margin of 0.75% to 1.25%

Schedule of Changes in Debt Issuance Costs

The table below summarizes changes in debt issuance costs.

	September 30,
	2021
	(Unaudited)
Debt issuance costs
Beginning balance	$	1,670,529
Less: Amortization expense		(266,153	)
Debt issuance costs, net of accumulated amortization	$	1,404,376

Schedule of Other Long-Term Liabilities, Net

Other long-term liabilities, net

	September 30,		December 31,
	2021		2020
	(Unaudited)
Deferred seller consideration, net	$	1,133,872	$	986,028
Deferred consideration - earn-out		440,000		440,000
Operating lease liability - long-term portion		30,497		543,564
Other		4,166		4,167
	$	1,608,535	$	1,973,759

Leases (Tables)

9 Months Ended

Sep. 30, 2021

Lessee Disclosure [Abstract]

Future Minimum Lease Payments Required Under Office Leases

The future minimum lease payments required under our office leases as of September 30, 2021 are as follows:

	Amount
2021	$	173,700
2022		528,750
2023		24,513
Total lease payments		726,963
Less: Interest		(14,691	)
Present value of lease liabilities	$	712,272

Summary of Lease Related Assets and Liabilities Recorded on Balance Sheet

The table below presents the lease related assets and liabilities recorded on the balance sheet. Right-of-use assets and related liabilities related to finance leases at September 30, 2021 are de minimis.

	September 30,		December 31,
	2021		2020
Operating Leases:	(Unaudited)
Right-of-use operating lease asset:
Property and equipment, net and other assets	$	650,659	$	1,103,761

Lease Liabilities:
Accounts payable and accrued liabilities	$	681,775	$	668,019
Other long-term liabilities		30,497		543,564
Total operating lease liabilities	$	712,272	$	1,211,583

Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue From Contract With Customer [Abstract]

Summary of Revenue Disaggregated by Source

The following table presents our revenue disaggregated by source.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(Unaudited)				(Unaudited)
Revenue Type:
Services	$	35,267,085	$	21,554,215	$	102,567,569	$	64,539,439
Product sales and other		2,099,655		2,147,011		6,759,245		6,462,842
Total revenue	$	37,366,740	$	23,701,226	$	109,326,814	$	71,002,281

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Summary of Warrant Activity

The following table summarizes the warrants issued and outstanding as of September 30, 2021:

Date of

Shares of

Description

Issuance

Expiration

Exercise Price

Common Stock

Exercisable Warrants

10/19/2020

03/19/2028

$

1.50

500,000

Summary of Stock Option Activity

The following table summarizes the stock option activity for the nine months ended September 30, 2021

	Stock Options
					Weighted-
				Exercise	Average
	Number			Price Per	Exercise Price
	of Shares			Share	Per Share
Outstanding at December 31, 2020		3,177,942		$1.17 — $23.20	$	2.78
Granted		241,063		$3.01 — $3.98	$	3.85
Exercised		(176,427	)	$1.48 — $6.40	$	2.98
Cancelled/Forfeited		(27,743	)	$1.48 — $16.80	$	7.62
Outstanding at September 30, 2021		3,214,835		$1.17 — $23.20	$	2.81

Warrants [Member]

Summary of Warrant Activity

Warrant activity for the nine months ended September 30, 2021 was as follows:

	Warrants
						Weighted-
						Average
	Number			Exercise Price		Exercise Price
	of Shares			per Share		Per Share
Outstanding at December 31, 2020		1,021,060		$1.15 — $3.88		$	1.56
Exercised		(181,834	)	$1.15 — $3.88		$	1.23
Canceled/Forfeited		(339,226	)	$1.15 — $3.88		$	1.83
Outstanding at September 30, 2021		500,000			$1.50	$	1.50

Net Income per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income per Share Attributable to Common Stockholders

The computation of basic and diluted net income per share attributable to common stockholders is as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
	2021		2020			2021		2020
	(Unaudited)					(Unaudited)
Numerator:
Net income (loss)	$	385,764	$	(66,589	)	$	2,231,810	$	910,747
Deemed dividend for warrant down round provision		—		(205,014	)		—		(205,014	)
Net income (loss) applicable to common stockholders	$	385,764	$	(271,603	)	$	2,231,810	$	705,733
Denominator:
Weighted average common shares outstanding, basic		18,984,979		17,290,447			18,784,722		16,055,110
Effect of dilutive common shares		2,322,875		—			1,919,548		15,165
Weighted average common shares outstanding, diluted		21,307,854		17,290,447			20,704,270		16,070,275
Net income (loss) per share:
Basic	$	0.02	$	(0.02	)	$	0.12	$	0.04
Diluted	$	0.02	$	(0.02	)	$	0.11	$	0.04
Anti-dilutive securities excluded from diluted net income per share:
Stock options		413,518		3,222,875			151,018		3,207,710
Warrants		—		521,060			—		521,060
Total anti-dilutive securities excluded from net income per share		413,518		3,743,935			151,018		3,728,770

The Company and Description of Business - Additional Information (Detail)	Oct. 19, 2020
Green Remedies Waste and Recycling, Inc [Member]
Description Of Business [Line Items]
Business acquisition, effective date	Oct. 19, 2020

Acquisitions - Additional Information (Detail) - Green Remedies [Member]				9 Months Ended
	Oct. 21, 2021 shares	Oct. 19, 2021 shares	Oct. 19, 2020 USD ($)	Sep. 30, 2021 USD ($) Installment
Business Acquisition [Line Items]
Total purchase price			$ 16,100,000
Earn out estimate future performance period			3 years
Earn-out liability				$ 440,000
Asset Purchase Agreement [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Earn-out payments				2,250,000
Consideration Agreement [Member] \| Subsequent Event [Member]
Business Acquisition [Line Items]
Issuance of shares of common stock \| shares	218,587	218,587
Deferred Consideration [Member] \| Cash or Shares of Common Stock [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred, liabilities incurred				$ 2,684,250
Number of installments \| Installment				2

Acquisitions - Schedule of Purchase Price Allocation Amount of Assets Acquired and Liabilities Assumed (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Oct. 19, 2020
Purchase price allocation:
Goodwill	$ 66,794,747	$ 66,310,385
Green Remedies [Member]
Purchase price allocation:
Accounts receivable, net			$ 1,331,190
Machinery and equipment			1,270,705
Intangible assets			5,890,000
Goodwill			8,101,895
Current liabilities			(527,907)
Assets acquired and liabilities assumed, net			$ 16,065,883

Acquisitions - Schedule of Unaudited Pro Forma Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Business Combinations [Abstract]
Revenue	$ 26,800,332	$ 80,019,046
Net income (loss)	$ (60,625)	$ 852,674
Income per share - basic and diluted	$ 0.00	$ 0.05

Property and Equipment, Net, and Other Assets - Components of Property and Equipment, Net, and Other Assets (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Property And Equipment Net And Other Assets [Abstract]
Property and equipment, net of accumulated depreciation of $2,540,661 and $2,195,198 as of September 30, 2021 and December 31, 2020, respectively	$ 2,077,981	$ 1,987,006
Right-of-use operating lease asset	650,659	1,103,761
Security deposits and other assets	635,080	293,288
Property and equipment, net, and other assets	$ 3,363,720	$ 3,384,055

Property and Equipment, Net, and Other Assets - Components of Property and Equipment, Net, and Other Assets (Parenthetical) (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Property And Equipment Net And Other Assets [Abstract]
Accumulated depreciation, Property and equipment	$ 2,540,661	$ 2,195,198

Property and Equipment, Net, and Other Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Feb. 20, 2018
Property And Equipment Net And Other Assets [Line Items]
Depreciation	$ 119,865	$ 63,089	$ 345,463	$ 164,156
Asset Purchase Agreement [Member] \| Earth Media Partners, LLC [Member]
Property And Equipment Net And Other Assets [Line Items]
Percentage of ownership interest						19.00%
Ownership interest amount recorded as investment						$ 246,585
Accrued earn-out amount	333,929		333,929		$ 259,017
Asset Purchase Agreement [Member] \| Earth Media Partners, LLC [Member] \| Wholly Owned Subsidiary and Earth911, Inc. [Member] \| Disposal Group, Not Discontinued Operations [Member]
Property And Equipment Net And Other Assets [Line Items]
Future earn-out amount						$ 350,000
Service [Member]
Property And Equipment Net And Other Assets [Line Items]
Depreciation reflected in cost of revenue	$ 74,495	$ 25,597	$ 215,287	$ 53,871

Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 10,202,960	$ 8,273,744
Accumulated Amortization	2,939,630	1,745,414
Net	$ 7,263,330	$ 6,528,330
Customer lists [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years	5 years
Gross Carrying Amount	$ 7,190,000	$ 5,480,000
Accumulated Amortization	1,125,521	218,022
Net	$ 6,064,479	$ 5,261,978
Software [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	7 years	7 years
Gross Carrying Amount	$ 2,215,744	$ 2,153,061
Accumulated Amortization	1,515,194	1,285,058
Net	$ 700,550	$ 868,003
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	7 years	7 years
Gross Carrying Amount	$ 426,533	$ 410,000
Accumulated Amortization	56,565	11,651
Net	$ 369,968	$ 398,349
Non-compete agreement [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Gross Carrying Amount	$ 140,000
Accumulated Amortization	11,667
Net	$ 128,333
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Estimated Useful Life	7 years	7 years
Gross Carrying Amount	$ 230,683	$ 230,683
Accumulated Amortization	$ 230,683	$ 230,683

Goodwill and Other Intangible Assets - Schedule of Changes in Goodwill (Detail)	9 Months Ended
	Sep. 30, 2021 USD ($)
Intangible Assets Net Including Goodwill [Abstract]
Goodwill balance at December 31, 2020	$ 66,310,385
Addition related to acquisition	484,362
Goodwill balance at September 30, 2021	$ 66,794,747

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 463,087	$ 112,679	$ 1,194,215	$ 707,775
Indefinite-lived intangible assets other than goodwill			0
Goodwill	66,794,747		66,794,747		$ 66,310,385
Impairment of goodwill	0
Not Deductible for Tax Purposes [Member]
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	58,200,000		58,200,000
Deductible for Tax Purposes [Member]
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 8,600,000		$ 8,600,000

Current Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Accounts Payable And Accrued Liabilities Current [Abstract]
Accounts payable	$ 18,664,311	$ 12,511,678
Accrued taxes	1,195,674	837,443
Employee compensation	1,272,083	1,003,365
Operating lease liability - current portion	681,775	668,019
Other	292,217	226,334
Accounts payable and accrued liabilities	$ 22,106,060	$ 15,246,839

Current Liabilities - Components of Other Current Liabilities (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities Current [Abstract]
Deferred seller consideration, current	$ 1,342,125	$ 1,342,125
Deferred revenue	336,245	50,454
Other current liabilities	$ 1,678,370	$ 1,392,579

Notes Payable and Other Long-term Liabilities, Net - Schedule of Debt Obligations (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total notes payable	$ 18,972,317	$ 18,483,583
Less: Current portion of long-term debt	(651,800)	(624,383)
Less: Unamortized debt issuance costs	(1,404,376)	(1,670,529)
Less: Unamortized OID	(417,205)	(494,343)
Less: Unamortized OID warrant	(621,267)	(745,703)
Notes payable, net	$ 15,877,669	14,948,625
Monroe Term Loan [Member]
Debt Instrument [Line Items]
Interest Rate	8.75%
Total notes payable	$ 11,413,750	11,500,000
Green Remedies Promissory Note [Member]
Debt Instrument [Line Items]
Interest Rate	3.00%
Total notes payable	$ 2,309,032	2,684,250
PNC ABL Facility [Member]
Debt Instrument [Line Items]
Interest Rate	3.00%
Total notes payable	$ 5,249,535	$ 4,299,333

Notes Payable and Other Long-term Liabilities, Net - Schedule of Debt Obligations (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2021	Oct. 19, 2020
Debt Instrument [Line Items]
Debt instrument stated interest rate		3.00%
Green Remedies Promissory Note [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument stated interest rate	3.00%
Discounted cash flow rate	13.00%
Minimum [Member] \| Monroe Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	7.50%
Minimum [Member] \| PNC ABL Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	0.75%
Maximum [Member] \| Monroe Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	10.50%
Maximum [Member] \| PNC ABL Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	1.25%

Notes Payable and Other Long-term Liabilities, Net - Schedule of Changes in Debt Issuance Costs (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Beginning balance	$ 1,670,529
Less: Amortization expense	(266,153)	$ (62,684)
Debt issuance costs, net of accumulated amortization	$ 1,404,376

Notes Payable and Other Long-term Liabilities, Net - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended
	Oct. 19, 2020	Aug. 05, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,684,250
Debt instrument annual interest rate	3.00%
Interest expense related to borrowings			$ 334,946	$ 56,845	$ 1,030,377	$ 181,439
Debt issuance cost			1,757,856		1,757,856
Unamortized portion of debt discount			1,404,376		1,404,376		$ 1,670,529
Interest expense related to amortization of debt issuance costs					266,153	$ 62,684
Green Remedies [Member]
Debt Instrument [Line Items]
Earn-out liability			440,000		440,000
OID [Member]
Debt Instrument [Line Items]
Unamortized portion of debt discount			1,246,726		1,246,726
Interest expense related to amortization of debt issuance costs					349,418
Debt discounts					1,674,178
Deferred consideration unamortized portion			208,253		208,253		$ 356,097
Monroe Capital Credit Agreement [Member]
Debt Instrument [Line Items]
Debt discounts	$ 766,000
Monroe Capital Credit Agreement [Member] \| Equity Offering [Member]
Debt Instrument [Line Items]
Sale of stock, number of shares issued in transaction	500,000
Warrant issued	350,000
Price per warrant	$ 1.50
Warrant expiration date	Mar. 19, 2028
Minimum net proceeds receivable by warrant holders	$ 1,000,000
Monroe Capital Credit Agreement [Member] \| Senior Secured Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Oct. 19, 2025
Revolving credit current borrowing facility	$ 11,500,000
Percentage of original principal amount	1.00%
Maximum [Member] \| Monroe Capital Credit Agreement [Member] \| Delayed Draw Term Loan Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum principal amount	$ 12,500,000
Maximum [Member] \| Monroe Capital Credit Agreement [Member] \| Accordion Term Loan Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum principal amount	$ 40,000,000.0
Maximum [Member] \| Asset Purchase Agreement [Member] \| Green Remedies [Member]
Debt Instrument [Line Items]
Earn-out payments					2,250,000
ABL Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum principal amount		$ 15,000,000.0
Sublimit for issuance of letters of credit, percentage		10.00%
Debt instrument maturity date		Apr. 19, 2025
Revolving credit facility, increase (decrease)		$ 10,000,000
Revolving credit current borrowing facility			15,000,000		15,000,000
Revolving credit current borrowing facility, outstanding			$ 5,249,535		$ 5,249,535
ABL Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate			3.00%		3.00%
ABL Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate			0.00%		0.00%
ABL Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		0.75%
ABL Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		1.75%
ABL Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		1.25%
ABL Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		2.25%
Equipment Loan Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maximum principal amount		$ 2,000,000.0
Debt instrument maturity date		Apr. 19, 2025
Equipment Loan Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		1.75%
Equipment Loan Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		2.75%

Notes Payable and Other Long-term Liabilities, Net - Schedule of Other Long-Term Liabilities, Net (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Deferred seller consideration, net	$ 1,133,872	$ 986,028
Deferred consideration - earn-out	440,000	440,000
Operating lease liability - long-term portion	30,497	543,564
Other	4,166	4,167
Other long-term liabilities, net	$ 1,608,535	$ 1,973,759

Leases - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended		24 Months Ended
Leases - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Aug. 31, 2022	Dec. 31, 2020	Jan. 01, 2019
Lessee Lease Description [Line Items]
Operating right-of-use asset	$ 650,659		$ 650,659			$ 1,103,761
Operating lease liabilities	712,272		712,272			$ 1,211,583
Fixed cost operating lease expense	$ 158,000	$ 150,000	$ 475,000	$ 450,000
Sublease commencement period			Dec. 01, 2019
Sublease expiration, month and year			2022-08
Sublease income, net of amortized leasing costs			$ 39,000
Texas [Member]
Lessee Lease Description [Line Items]
Operating lease period			84 months
Operating lease, remaining lease term	1 year		1 year
Operating lease, effective interest rate	2.456%		2.456%
North Carolina [Member] \| Green Remedies [Member]
Lessee Lease Description [Line Items]
Operating right-of-use asset	$ 80,000		$ 80,000
Operating leases expiration period			2023-10
Operating lease, remaining lease term	2 years 1 month 6 days		2 years 1 month 6 days
Operating lease, effective interest rate	9.50%		9.50%
ASU 2016-02 [Member]
Lessee Lease Description [Line Items]
Operating right-of-use asset							$ 2,000,000.0
Operating lease liabilities							$ 2,200,000
Scenario, Forecast [Member]
Lessee Lease Description [Line Items]
Operating lease minimum annual incentive payment					$ 93,600

Leases - Future Minimum Lease Payments Required Under Office Lease (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Operating Lease Liabilities Payments Due [Abstract]
2021	$ 173,700
2022	528,750
2023	24,513
Total lease payments	726,963
Less: Interest	(14,691)
Present value of lease liabilities	$ 712,272	$ 1,211,583

Leases - Summary of Lease Related Assets and Liabilities Recorded on Balance Sheet (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Assets And Liabilities Lessee [Abstract]
Right-of-use operating lease asset	$ 650,659	$ 1,103,761
Operating Lease, Right-of-Use Assets, Statement of Financial Position [Extensible List]	Property and equipment, net, and other assets	Property and equipment, net, and other assets
Operating lease liability - current portion	$ 681,775	$ 668,019
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Operating lease liability - long-term portion	$ 30,497	$ 543,564
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities, net	Other long-term liabilities, net
Total operating lease liabilities	$ 712,272	$ 1,211,583

Revenue - Additional Information (Detail)	3 Months Ended		9 Months Ended
Revenue - Additional Information (Detail)	Sep. 30, 2021 USD ($) Customer	Sep. 30, 2020 USD ($) Customer	Sep. 30, 2021 USD ($) Customer	Sep. 30, 2020 USD ($) Customer	Dec. 31, 2020 USD ($)
Revenue Recognition [Line Items]
Number of customer \| Customer	2	3	2	3
Deferred contract costs	$ 60,000		$ 60,000		$ 100,000
Deferred revenue	336,245		336,245		$ 50,454
Selling, General and Administrative Expense [Member]
Revenue Recognition [Line Items]
Amortized deferred contract costs	$ 50,000	$ 52,500	$ 150,000	$ 161,250
Customer Concentration Risk [Member] \| Sales Revenue Net [Member] \| Customers [Member]
Revenue Recognition [Line Items]
Percentage of revenue	39.40%	49.40%	43.80%	52.00%

Revenue - Summary of Revenue Disaggregated by Source (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 37,366,740	$ 23,701,226	$ 109,326,814	$ 71,002,281
Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	35,267,085	21,554,215	102,567,569	64,539,439
Product Sales and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 2,099,655	$ 2,147,011	$ 6,759,245	$ 6,462,842

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax [Line Items]
Income tax expense	$ 108,003	$ 92,046	$ 262,449	$ 63,800
Federal corporate income tax rate			27.00%
Valuation allowance	11,087,000		$ 11,087,000		$ 12,533,000
Federal income tax net operating loss carry forward	10,200,000		$ 10,200,000		$ 14,500,000
Net operating loss carry forwards expiration beginning year			2032
Net operating loss carry forwards expiration ending year			2037
State [Member]
Income Tax [Line Items]
Operating loss carryforwards	$ 0	$ 0	$ 0	$ 0

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Stockholders' Equity - Additional Information (Detail) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	18,802,359	18,413,419
Common stock, shares outstanding	18,802,359	18,413,419

Stockholders' Equity - Additional Information - Employee Stock Purchase Plan (Detail) - USD ($)		3 Months Ended		9 Months Ended
	May 14, 2021	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Shares issued for employee stock purchase plans options, shares	22,937
Shares issued for employee stock purchase plans options	$ 38,988	$ 38,988	$ 30,040
Employee stock purchase plan expense				$ 24,586	$ 25,280

Stockholders' Equity - Summary of Warrant Activity (Detail)	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding Beginning Balance, Number of Shares \| shares	3,177,942
Exercised, Number of Shares \| shares	(176,427)
Canceled/Forfeited, Number of Shares \| shares	(27,743)
Outstanding Ending Balance, Number of Shares \| shares	3,214,835
Outstanding Beginning Balance, Weighted-Average Exercise Price Per Share	$ 2.78
Exercised, Weighted-Average Exercise Price Per Share	2.98
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share	$ 2.81
Warrants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding Beginning Balance, Number of Shares \| shares	1,021,060
Exercised, Number of Shares \| shares	(181,834)
Canceled/Forfeited, Number of Shares \| shares	(339,226)
Outstanding Ending Balance, Number of Shares \| shares	500,000
Outstanding Beginning Balance, Weighted-Average Exercise Price Per Share	$ 1.56
Exercised, Weighted-Average Exercise Price Per Share	1.23
Canceled/Forfeited, Weighted-Average Exercise Price Per Share	1.83
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share	1.50
Warrants [Member] \| Outstanding $1.15 - $3.88 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.15
Exercise Price Per Share, Maximum	3.88
Warrants [Member] \| Exercised, $1.15 - $3.88 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.15
Exercise Price Per Share, Maximum	3.88
Warrants [Member] \| Canceled/Forfeited, $1.15 - $3.88 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.15
Exercise Price Per Share, Maximum	3.88
Warrants [Member] \| Outstanding, $1.50 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Maximum	$ 1.50

Stockholders' Equity - Summary of Warrants Issued and Outstanding (Detail) - Exercisable Warrants [Member] - Warrants One [Member]	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Class Of Warrant Or Right [Line Items]
Date of Issuance	Oct. 19, 2020
Date of Expiration	Mar. 19, 2028
Price per warrant \| $ / shares	$ 1.50
Shares of Common Stock \| shares	500,000

Stockholders' Equity - Additional Information - Stock Options (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Stock options expense	$ 575,437	$ 878,405

Stockholders' Equity - Summary of Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding Beginning Balance, Number of Shares \| shares	3,177,942
Granted, Number of Shares \| shares	241,063
Exercised, Number of Shares \| shares	(176,427)
Canceled/Forfeited, Number of Shares \| shares	(27,743)
Outstanding Ending Balance, Number of Shares \| shares	3,214,835
Outstanding Beginning Balance, Weighted-Average Exercise Price Per Share	$ 2.78
Granted, Weighted-Average Exercise Price Per Share	3.85
Exercised, Weighted-Average Exercise Price Per Share	2.98
Cancelled/Forfeited, Weighted-Average Exercise Price Per Share	7.62
Outstanding Ending Balance, Weighted-Average Exercise Price Per Share	2.81
Outstanding, $1.17 - $23.20 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.17
Exercise Price Per Share, Maximum	23.20
Granted, $3.01 - $3.48 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	3.01
Exercise Price Per Share, Maximum	3.48
Exercised, $1.48 - $3.10 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.48
Exercise Price Per Share, Maximum	6.40
Cancelled/Forfeited, $1.48 - $5.44 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.48
Exercise Price Per Share, Maximum	16.80
Outstanding, $1.17 - $23.20 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Per Share, Minimum	1.17
Exercise Price Per Share, Maximum	$ 23.20

Stockholders' Equity - Additional Information - Deferred Stock Units (Detail) - Deferred Stock Units [Member] - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Sep. 01, 2019
Schedule Of Stockholders Equity [Line Items]
Number of stock unit received				1
Deferred stock units	81,249	41,719
Compensation expense related to grants	$ 157,009	$ 134,509
DSUs outstanding	196,513		73,231
Director [Member]
Schedule Of Stockholders Equity [Line Items]
Compensation expense related to grants	$ 384,708	$ 63,234
Executive Employees [Member]
Schedule Of Stockholders Equity [Line Items]
Deferred stock units	49,775	39,684

Net Income per Share - Computation of Basic and Diluted Net Income per Share Attributable to Common Stockholders (Detail) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss)	$ 385,764	$ 699,306	$ 1,146,740	$ (66,589)	$ 1,209,003	$ (231,667)	$ 2,231,810	$ 910,747
Deemed dividend for warrant down round feature				(205,014)				(205,014)
Net income (loss) applicable to common stockholders	$ 385,764			$ (271,603)			$ 2,231,810	$ 705,733
Denominator:
Weighted average common shares outstanding, basic	18,984,979			17,290,447			18,784,722	16,055,110
Effect of dilutive common shares	2,322,875						1,919,548	15,165
Weighted average common shares outstanding, diluted	21,307,854			17,290,447			20,704,270	16,070,275
Net income (loss) per share applicable to common stockholders
Basic	$ 0.02			$ (0.02)			$ 0.12	$ 0.04
Diluted	$ 0.02			$ (0.02)			$ 0.11	$ 0.04
Anti-dilutive securities excluded from diluted net income per share:
Anti-dilutive securities excluded from diluted net income per share	413,518			3,743,935			151,018	3,728,770
Stock options [Member]
Anti-dilutive securities excluded from diluted net income per share:
Anti-dilutive securities excluded from diluted net income per share	413,518			3,222,875			151,018	3,207,710
Warrants [Member]
Anti-dilutive securities excluded from diluted net income per share:
Anti-dilutive securities excluded from diluted net income per share				521,060				521,060

Subsequent Events - Additional Information (Detail) - Consideration Agreement [Member] - Subsequent Event [Member] - Green Remedies [Member]	Oct. 21, 2021 Installment shares	Oct. 19, 2021 shares
Subsequent Event [Line Items]
Shares of common stock issued \| shares	218,587	218,587
Number of equal installments \| Installment	2
Date of acquisition agreement	Oct. 19, 2020

Carrying

Amount

Changes in goodwill:

Goodwill balance at December 31, 2020

Addition related to acquisition

Goodwill balance at September 30, 2021