Significant Accounting Policies [Text Block]

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Consolidation

The consolidated financial statements include the accounts of Hallador Energy Company (hereinafter known as, “we, us, or our”) and its wholly owned subsidiaries Sunrise Coal, LLC (Sunrise) and Hourglass Sands, LLC (Hourglass), and Sunrise’s wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Sunrise is engaged in the production of steam coal from mines located in western Indiana.

Segment Information

The Company’s significant operating segment includes the two Oaktown underground mines located in southwestern Indiana. The Company’s chief operating decision maker (“CODM”) reviews the operating results, assesses performance and makes decisions about allocation of resources to this segment at the mine level, however, we aggregate the results of operations of the mines for reporting purposes since the nature of the product, production process, customer type, product distribution, and long-term economic characteristics at each mine are similar.

Allowance for Doubtful Accounts

The Company evaluates the need for an allowance for uncollectible receivables based on a review of account balances that are likely to be uncollectible, as determined by such variables as customer creditworthiness, the age of the receivables and disputed amounts. Historically, credit losses have been insignificant. At December 31, 2020 and 2019, no allowance was recorded for uncollectible accounts receivable as all amounts were deemed collectible.

Inventory

Inventory and parts and supplies are valued at the lower of average cost or net realizable value determined using the first-in first-out method. Inventory costs include labor, supplies, operating overhead, and other related costs incurred at or on behalf of the mining location, including depreciation, depletion, and amortization of equipment, buildings, mineral rights, and mine development costs.

Prepaid expenses

Prepaid expenses include prepaid insurance, prepaid maintenance expense, and a prepaid balance with our primary parts and supplies vendor.

Advanced Royalties

Coal leases that require minimum annual or advance payments and are recoverable from future production are generally deferred and charged to expense as the coal is subsequently produced. Advance royalties are included in other assets.

Mining Properties

Mining properties are recorded at cost. Interest costs applicable to major asset additions are capitalized during the construction period. Expenditures that extend the useful lives or increase the productivity of the assets are capitalized. The cost of maintenance and repairs that do not extend the useful lives or increase the productivity of the assets are expensed as incurred. Other than land and most mining equipment, mining properties are depreciated using the units-of-production method over the estimated recoverable reserves. Most surface and underground mining equipment is depreciated using estimated useful lives ranging from three to twenty-five years.

If facts and circumstances suggest that a long-lived asset may be impaired, the carrying value is reviewed for recoverability. If this review indicates that the carrying value of the asset will not be recoverable through estimated undiscounted future net cash flows related to the asset over its remaining life, then an impairment loss is recognized by reducing the carrying value of the asset to its estimated fair value. See Note 2 for further discussion of impairments.

Mine Development

Costs of developing new mines, including asset retirement obligation assets, or significantly expanding the capacity of existing mines, are capitalized and amortized using the units-of-production method over estimated recoverable reserves.

Asset Retirement Obligations (ARO) – Reclamation

At the time they are incurred, legal obligations associated with the retirement of long-lived assets are reflected at their estimated fair value, with a corresponding charge to mine development. Obligations are typically incurred when we commence development of underground and surface mines and include reclamation of support facilities, refuse areas and slurry ponds.

Obligations are reflected at the present value of their future cash flows. We reflect accretion of the obligations for the period from the date they are incurred through the date they are extinguished. The ARO assets are amortized using the units-of-production method over estimated recoverable (proved and probable) reserves. We are using credit-adjusted risk-free discount rates ranging from 5.0% to 10% to discount the obligation. Federal and state laws require that mines be reclaimed in accordance with specific standards and approved reclamation plans, as outlined in mining permits. Activities include reclamation of pit and support acreage at surface mines, sealing portals at underground mines, and reclamation of refuse areas and slurry ponds.

We review our ARO at least annually and reflect revisions for permit changes, changes in our estimated reclamation costs and changes in the estimated timing of such costs. In the event we are not able to perform reclamation, we have surety bonds totaling $27 million to cover ARO.

The table below (in thousands) reflects the changes to our ARO:

Year Ended December 31,

2020

2019

Balance, beginning of year
$ 15,764 $ 14,646

Accretion
1,381 1,272

Revisions
— 95

Payments
(868 ) (249 )

Balance, end of year
16,277 15,764

Less current portion
(100 ) (70 )

Long-term balance, end of year
$ 16,177 $ 15,694

Interest Rate Swaps

The Company generally utilizes derivative instruments to manage exposures to interest rate risk on long-term debt. The Company enters into interest rate swaps in order to achieve a mix of fixed and variable rate debt that it deems appropriate. These interest rate swaps have not been designated as hedging instruments and are accounted for as an asset or a liability in the accompanying Consolidated Balance Sheets at their fair value. Realized gains and losses are classified as operating activities in the accompanying Consolidated Statements of Cash Flows.

Statement of Cash Flows

Cash equivalents include investments with maturities when purchased of three months or less.

Income Taxes

Income taxes are provided based on the liability method of accounting. The provision for income taxes is based on pretax financial income. Deferred tax assets and liabilities are recognized for the future expected tax consequences of temporary differences between income tax and financial reporting and principally relate to differences in the tax basis of assets and liabilities and their reported amounts, using enacted tax rates in effect for the year in which differences are expected to reverse.

Net Income (Loss) per Share

Basic net income (loss) per share is computed on the basis of the weighted average number of shares of common stock outstanding during the period using the two-class method for our common shares and RSUs which share in the Company’s earnings. Diluted net income (loss) per share is computed on the basis of the weighted average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include restricted stock units and are included in basic net income (loss) per share, using the two-class method.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual amounts could differ from those estimates. The most significant estimates included in the preparation of the financial statements relate to: (i) deferred income tax accounts, (ii) coal reserves, (iii) depreciation, depletion, and amortization, (iv) estimates relating to interest rate swaps, and (v) estimates used in our impairment analysis and measurement of impairments.

Long-term Contracts

As of December 31, 2020, we are committed to supplying our customers up to a maximum of 21.6 million tons of coal through 2027 of which 13.7 million tons are priced.

For 2020, we derived 79% of our coal sales from four customers, each representing at least 10% of our coal sales. 87% of our accounts receivable was from four customers, each representing more than 10% of the December 31, 2020 balance.

For 2019, we derived 70% of our coal sales from four customers, each representing at least 10% of our coal sales. 68% of our accounts receivable was from three customers, each representing more than 10% of the December 31, 2019 balance.

Stock-based Compensation

Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the applicable vesting period of the stock award (generally two to four years) using the straight-line method.

Note 2 - Long-lived Asset Impairments

12 Months Ended

Dec. 31, 2020

Asset Impairment Charges [Text Block]

(2) LONG-LIVED ASSET IMPAIRMENTS

Long-lived assets are reviewed for impairment whenever events or changes in circumstance indicate that the carrying amount of the assets may not be recoverable. The impact of COVID-19 is being monitored closely, but for the year ended December 31, 2020, there were no material COVID-19 related impairment charges recorded for long-lived assets.

Carlisle Mine

Due to softness in the market in Q4 2019 and the elevated cost structure of the Carlisle Mine, we made the decision to idle the Carlisle Mine during Q4 2019 with the intent to recommence production in 2020, and accordingly, we conducted an evaluation of impairment on the Carlisle Mine utilizing a discounted future cash flow model using the income approach. We utilized a discount rate of 10% in discounting the estimated cash flows. Other key assumptions included the anticipated demand of overall tons of coal over the remaining life of the mine, the average selling price per ton of coal, operating cost per ton and expected future capital expenditures to support the anticipated production levels. We also assessed the impairment based upon the potential closure of the mine which was being contemplated at the time and considered both scenarios in determining the amount of impairment at December 31, 2019. Based on our review, we recorded an impairment of $65.7 million related to the Carlisle Mine as of December 31, 2019, which included buildings, land, rail, mine development, equipment, and advanced royalties. Buildings, land, and rail were impaired to their estimated salvage value. The remaining salvage value of land and buildings at the Carlisle Mine was estimated at $1.8 million as of December 31, 2019. The fair value of the assets used in our impairment assessment was determined using a market approach based on recent sales of similar property. Subsequent to year end during late Q1 2020 we determined that it was economically prudent to permanently close the Carlisle Mine. Equipment totaling $23 million is being redeployed and utilized at the Oaktown mines. No additional impairment costs were recorded during 2020 as a result of the decision to close the Carlisle Mine. Exit and disposal costs to close the mine were $1.1 million, which were recorded as current period costs in Q1 and Q2 of 2020. We also evaluated whether the closure of the Carlisle Mine should be considered a discontinued operation and concluded while the mine does have discrete separately identifiable cashflows a strategic shift in our business had not occurred therefore the closure of the mine was not considered a discontinued operation under ASC 205-20.

Bulldog Reserves

As a result of the Carlisle Mine impairment, we determined that an impairment of the Bulldog Reserves was also necessary. With the closure of the Carlisle Mine, it became apparent that the likelihood of construction and opening of Bulldog was reduced. Based on our review, we recorded an impairment of $9.2 million as of December 31, 2019, which included land and advanced royalties, and was a complete impairment of all assets.

Hourglass Sands

We recorded an impairment of $2.9 million as of December 31, 2019, due to softness in the pricing of the frac sand market. The impairment included inventory, land, mine development, buildings and equipment and was determined using a market approach. The remaining fair market value of inventory, equipment, and buildings at Hourglass Sands was $1.9 million as of December 31, 2019. Due to the continued regression of the frac sand market, in August 2020, we ceased operations of the plant and recorded an impairment of $1.8 million in the third quarter of 2020, which included the remaining inventory and buildings and which was determined using a market approach.

Note 3 - Inventory

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Text Block]

(3) INVENTORY

Inventory is valued at lower of average cost or net realizable value (NRV). As of December 31, 2020, and December 31, 2019, coal inventory includes NRV adjustments of $1.6 million and $2.0 million, respectively.

Note 4 - Other Long-term Assets

12 Months Ended

Dec. 31, 2020

Other Assets Disclosure [Text Block]

(4) OTHER LONG-TERM ASSETS (IN THOUSANDS)

	*December 31,*
	*2020*		*2019*
Advanced coal royalties	$	6,449	$	6,105
Marketable equity securities available for sale, at fair value (restricted)*		—		2,296
Other		1,809		1,923
Total other assets	$	8,258	$	10,324

* Held by Sunrise Indemnity, Inc., our wholly owned captive insurance company.

Note 5 - Bank Debt

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Text Block]

(5) BANK DEBT

On April 15, 2020, we executed an amendment to our credit agreement with PNC, administrative agent for our lenders. The primary purposes of the amendment were to modify the allowable leverage ratio over the term of the loan to increase available liquidity. As a result of the amendment, our maximum annual capital expenditures are limited to $30 million for 2020 and $25 million for each year thereafter, and our dividend is suspended until our leverage ratio falls below 2.0X.

During 2020, we reduced our bank debt by $42.4 million, which as of December 31, 2020 was $137.7 million. Bank debt is comprised of term debt ($68 million as of December 31, 2020) and a $120 million revolver ($69.7 million borrowed as of December 31, 2020). The term debt amortization concludes with the final payment in March 2023. The revolver matures September 2023. Our debt is recorded at amortized cost, which approximates fair value due to the variable interest rates in the agreement and is collateralized primarily by our assets.

Liquidity

As of December 31, 2020, we had additional borrowing capacity of $43.8 million under the revolver and total liquidity of $51.8 million. Our additional borrowing capacity is net of $5.7 million in outstanding letters of credit as of December 31, 2020 that were required to maintain surety bonds. Liquidity consists of our additional borrowing capacity and cash and cash equivalents.

Fees

Unamortized bank fees and other costs incurred in connection with the initial facility and subsequent amendments totaled $7.9 million as of our amendment in April 2020. These costs were deferred and are being amortized over the term of the loan. Unamortized costs as of December 31, 2020 and 2019 were $6.1 million and $6.5 million, respectively. Additional costs incurred with the April 15 amendment were $1.9 million.

Bank debt, less debt issuance costs, is presented below (in thousands):

	*December 31,*
	*2020*			*2019*
Current bank debt	$	36,750		$	34,912
Less unamortized debt issuance cost		(2,439	)		(1,868	)
Net current portion	$	34,311		$	33,044

Long-term bank debt	$	100,988		$	145,238
Less unamortized debt issuance cost		(3,681	)		(4,644	)
Net long-term portion	$	97,307		$	140,594

Total bank debt	$	137,738		$	180,150
Less total unamortized debt issuance cost		(6,120	)		(6,512	)
Net bank debt	$	131,618		$	173,638

Covenants

The credit facility includes a Maximum Leverage Ratio (consolidated funded debt / trailing twelve months adjusted EBITDA), calculated as of the end of each fiscal quarter for the trailing twelve months, not to exceed the amounts below:

Fiscal Periods Ending		*Ratio*
December 31, 2020		3.50 to 1.00
March 31, 2021 and June 30, 2021		3.25 to 1.00
September 30, 2021 and December 31, 2021		3.00 to 1.00
March 31, 2022 and each fiscal quarter thereafter		2.50 to 1.00

As of December 31, 2020, our Leverage Ratio of 2.68 was in compliance with the requirements of the credit agreement.

The credit facility also requires a Minimum Debt Service Coverage Ratio (consolidated adjusted EBITDA / annual debt service) calculated as of the end of each fiscal quarter for the trailing twelve months of 1.05 to 1.00 through December 31, 2021, at which time it increases to 1.25 to 1.00 through the maturity of the credit facility.

As of December 31, 2020, our Debt Service Coverage Ratio of 1.22 was in compliance with the requirements of the credit agreement.

Interest Rate

The interest rate on the facility ranges from LIBOR plus 2.75% to LIBOR plus 4.00%, depending on our Leverage Ratio, with a LIBOR floor of 0.50%. We entered into swap agreements to fix the LIBOR component of the interest rate at 2.92% on the declining term loan balance and on $53 million of the revolver. At December 31, 2020, we are paying LIBOR at the swap rate of 2.92% plus 3.50% for a total interest rate of 6.42% on the hedged amount ($121 million) and 3.5% on the remainder ($16.7 million).

Future Maturities (in thousands):
2021		36,750
2022		25,725
2023		75,263
Total	$	137,738

Paycheck Protection Program

On April 16, 2020, we entered into an unsecured promissory note in the amount of $10 million under the Paycheck Protection Program (the “PPP Note”). The Paycheck Protection Program was established under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) and is administered by the U.S. Small Business Administration (the "SBA"). The PPP note was funded through First Financial Bank, N.A. (the “Lender”).

The annual interest rate on the PPP Note is 1.00%. Monthly principal and interest payments were originally deferred for six months after the date of the loan, but the deferral has been extended to 2021. If the note is not forgiven, monthly payments of ~$1.1 million will commence in August 2021 with maturity of April 2022. The PPP Note contains customary events of default relating to, among other things, payment defaults, making materially false and misleading representations to the SBA or Lender, or breaching the terms of the Loan Documents. The occurrence of an event of default may result in the repayment of all amounts outstanding, collection of all amounts owing from the Company, or filing suit and obtaining a judgment against the Company.

Under the terms of the CARES Act, PPP loan recipients can apply for and be granted forgiveness for all or a portion of the loan granted under the PPP. Such forgiveness will be determined, subject to limitations, based on the use of loan proceeds for payment of payroll costs and any covered payments of mortgage interest, rent, and utilities. In the event the PPP Loan, or any portion thereof, is forgiven pursuant to the PPP, the amount forgiven is applied to outstanding principal. The Company used all proceeds from the PPP Loan to maintain payroll and utility payments.

At December 31, 2020, the PPP loan totaling $10 million is presented as current and long-term liabilities on the condensed consolidated balance sheets based upon the schedule of repayments and excluding any possible forgiveness of the loan.

In December 2020, we applied for forgiveness of the full $10 million promissory note. On January 8, 2021, we were notified by the Lender that they had approved the application for the full forgiveness of the $10 million note and had forwarded on to the SBA for final approval. The SBA has 90 days from receipt of application from the Lender to make its determination as to the amount of forgiveness. There can be no assurance that any portion of the PPP loan will be forgiven.

If the SBA determines that the Company was not initially eligible under the program or concludes that the Company did not have an adequate basis for making the good-faith certification of the necessity of the loan at the time of application, the loan could become payable on demand. The SBA retains the right to review the Company's loan file for a period subsequent to the date the loan is forgiven or paid in full, with the potential for the SBA to pursue legal remedies at its discretion.

Note 6 - Accounts Payable and Accrued Liabilities

12 Months Ended

Dec. 31, 2020

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

(6) ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (IN THOUSANDS)

	*December 31,*
	*2020*		*2019*
Accounts payable	$	14,785	$	16,115
Accrued property taxes		2,566		2,835
Accrued payroll		1,621		2,151
Workers' compensation reserve		2,988		3,446
Group health insurance		1,800		2,500
Other		7,649		4,753
Total accounts payable and accrued liabilities	$	31,409	$	31,800

Note 7 - Revenue

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Text Block]

(7) REVENUE

Effective January 1, 2018, we adopted ASU 2014-09. The adoption of this standard did not impact the timing of revenue recognition on our consolidated balance sheets or consolidated statements of comprehensive income (loss).

Revenue from Contracts with Customers

We account for a contract with a customer when the parties have approved the contract and are committed to performing their respective obligations, the rights of each party are identified, payment terms are identified, the contract has commercial substance, and collectability of consideration is probable. We recognize revenue when we satisfy a performance obligation by transferring control of a good or service to a customer. We utilize the normal purchase normal sales exception for all long-term sales contracts.

Our revenue is derived from sales to customers of coal produced at our facilities. Our customers purchase coal directly from our mine sites and our Princeton Loop, where the sale occurs and where title, risk of loss, and control typically pass to the customer at that point. Our customers arrange for and bear the costs of transporting their coal from our mines to their plants or other specified discharge points. Our customers are typically domestic utility companies. Our coal sales agreements with our customers are fixed-priced, fixed-volume supply contracts, or include a predetermined escalation in price for each year. Price re-opener and index provisions may allow either party to commence a renegotiation of the contract price at a pre-determined time. Price re-opener provisions may automatically set a new price based on prevailing market price or, in some instances, require us to negotiate a new price, sometimes within specified ranges of prices. The terms of our coal sales agreements result from competitive bidding and extensive negotiations with customers. Consequently, the terms of these contracts vary by customer.

Coal sales agreements will typically contain coal quality specifications. With coal quality specifications in place, the raw coal sold by us to the customer at the delivery point must be substantially free of magnetic material and other foreign material impurities and crushed to a maximum size as set forth in the respective coal sales agreement. Price adjustments are made and billed in the month the coal sale was recognized based on quality standards that are specified in the coal sales agreement, such as Btu factor, moisture, ash, and sulfur content and can result in either increases or decreases in the value of the coal shipped.

Disaggregation of Revenue

Revenue is disaggregated by primary geographic markets, as we believe this best depicts how the nature, amount, timing, and uncertainty of our revenue and cash flows are affected by economic factors. 74% and 74% of our coal revenue for the years ended December 31, 2020 and 2019, respectively, was sold to customers in the State of Indiana with the remainder sold to customers in Florida, North Carolina, Kentucky, Georgia, South Carolina, and Tennessee.

Performance Obligations

A performance obligation is a promise in a contract with a customer to provide distinct goods or services. Performance obligations are the unit of account for purposes of applying the revenue recognition standard and therefore determine when and how revenue is recognized. In most of our contracts, the customer contracts with us to provide coal that meets certain quality criteria. We consider each ton of coal a separate performance obligation and allocate the transaction price based on the base price per the contract, increased or decreased for quality adjustments.

We recognize revenue at a point in time as the customer does not have control over the asset at any point during the fulfillment of the contract. For substantially all of our customers, this is supported by the fact that title and risk of loss transfer to the customer upon loading of the truck or railcar at the mine. This is also the point at which physical possession of the coal transfers to the customer, as well as the right to receive substantially all benefits and the risk of loss in ownership of the coal.

We have remaining performance obligations relating to fixed priced contracts of approximately $493 million, which represent the average fixed prices on our committed contracts as of December 31, 2020. We expect to recognize approximately 78% of this revenue in 2021 and 2022, with the remainder recognized thereafter.

We have remaining performance obligations relating to contracts with price reopeners of approximately $237 million, which represents our estimate of the expected re-opener price on committed contracts as of December 31, 2020. We expect to recognize all of this revenue beginning in 2022.

The tons used to determine the remaining performance obligations are subject to adjustment in instances of force majeure and exercise of customer options to either take additional tons or reduce tonnage if such option exists in the customer contract.

Contract Balances

Under ASC 606, the timing of when a performance obligation is satisfied can affect the presentation of accounts receivable, contract assets, and contract liabilities. The main distinction between accounts receivable and contract assets is whether consideration is conditional on something other than the passage of time. A receivable is an entity’s right to consideration that is unconditional. Under the typical payment terms of our contracts with customers, the customer pays us a base price for the coal, increased or decreased for any quality adjustments. Amounts billed and due are recorded as trade accounts receivable and included in accounts receivable in our consolidated balance sheets. We do not currently have any contracts in place where we would transfer coal in advance of knowing the final price of the coal sold, and thus do not have any contract assets recorded. Contract liabilities arise when consideration is received in advance of performance. This deferred revenue is included in accounts payable and accrued liabilities in our consolidated balance sheets when consideration is received, and revenue is not recognized until the performance obligation is satisfied. We are rarely paid in advance of performance, but we currently are carrying $0.3 million in deferred revenue recorded in our condensed balance sheets as of December 31, 2020 related to coal storage for one customer.

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
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Note 8 - Other Operating Income

12 Months Ended

Dec. 31, 2020

Other Operating Income and Expense [Text Block]

(8) OTHER OPERATING INCOME (IN THOUSANDS)

	*Year Ended December 31,*
	*2020*		*2019*
Equity income (loss) - Sunrise Energy	$	1,054	$	(527	)
MSHA reimbursements		400		575
Gain on sale of royalty interests in oil properties		—		2,949
Miscellaneous		1,757		3,029
	$	3,211	$	6,026

Note 9 - Income Taxes

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Text Block]

(9) INCOME TAXES

Our income tax is different than the expected amount computed using the applicable federal statutory income tax rate of 21%. The reasons for and effects of such differences for the years ended December 31 are below (in thousands):

	*2020*			*2019*
Expected amount	$	(1,865	)	$	(17,262	)
State income taxes, net of federal benefit		(644	)		(3,831	)
Percentage depletion		(2,154	)		(1,475	)
Valuation allowance		1,275			—
Stock-based compensation		67			326
Return to provision adjustments		(60	)		(78	)
Other		723			(27	)
	$	(2,658	)	$	(22,347	)

The deferred tax assets and liabilities resulting from temporary differences between book and tax basis are comprised of the following at December 31 (in thousands):

	*2020*			*2019*
Long-term deferred tax assets:
Net operating loss	$	24,081		$	18,956
Valuation allowance		(1,275	)		—
Interest limitation carryforward		—			1,801
Capital loss carryforward		525			555
Alternative minimum tax credit		—			524
Stock-based compensation		179			135
Other		529			1,029
Total long-term deferred tax assets:		24,039			23,000
Coal properties		(26,863	)		(27,884	)
Net deferred tax liability	$	(2,824	)	$	(4,884	)

Our effective tax rate (ETR) for 2020 was 30% compared to 27% for 2019. The tax rate for the years ended December 31, 2020 and 2019 are not predictive of future tax rates. Historically, our actual ETRs have differed from the statutory effective rates primarily due to the benefit received from statutory depletion allowances. The deduction for statutory depletion does not necessarily change proportionately to changes in income before income taxes.

We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. We believe that it is more likely than not that the benefit from certain state NOL carryforwards will not be realized. In recognition of this, we have provided a valuation allowance of $1.3 million and $0 on the deferred tax assets related to these state NOL carryforwards as of December 31, 2020 and 2019, respectively.

We have analyzed our filing positions in all of the federal and state jurisdictions where we are required to file income tax returns, as well as all open tax years in these jurisdictions, to determine whether the positions will be more likely than not be sustained by the applicable tax authority. Tax positions not deemed to meet the more-likely-than-not threshold are not recorded as a tax benefit or expense in the current year. We identified our federal tax return and our Indiana state tax return as “major” tax jurisdictions. We believe that our income tax filing positions and deduction will be sustained on audit and do not anticipate any adjustments that will result in a material change to our consolidated financial position. While not material, we record any penalties and interest as SG&A. Tax returns filed with the IRS and state entities generally remain subject to examination for three years after filing.

At December 31, 2020, we had approximately $89 million and $123 million of federal and Indiana net operating loss carryforwards (“NOLs”), respectively. These NOLs are available to offset future taxable income. Federal NOLs generated in 2017 and prior years have a carryforward period of 20 years while those generated in 2018 and future years carryforward indefinitely. The federal NOLs will expire in varying amounts from 2035 to 2037 if they are not utilized. Indiana NOLs have a 20-year carryforward period and will expire in the years 2034 to 2040 if they are not utilized.

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 + Details

Note 10 - Stock Compensation Plans

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Text Block]

(10) STOCK COMPENSATION PLANS

Restricted Stock Units (RSUs)

The table below shows the number of RSUs available for issuance at December 31, 2020:

Total authorized RSUs in Plan approved by shareholders	4,850,000
Stock issued out of the Plan from vested grants	(3,091,049	)
Non-vested grants	(324,250	)
RSUs available for future issuance	1,434,701

Non-vested grants at December 31, 2018	789,250
Granted – weighted average share price on grant date was $3.98	17,000
Vested – weighted average share price on vesting date was $2.95	(297,250	)
Forfeited	(20,500	)
Non-vested grants at December 31, 2019	488,500
Granted – weighted average share price on grant date was $.90	40,000
Vested – weighted average share price on vesting date was $.92	(193,250	)
Forfeited	(11,000	)
Non-vested grants at December 31, 2020	324,250

RSU Vesting Schedule

Vesting Year	*RSUs Vesting*
2021		305,250
2022		9,000
2023		10,000
		324,250

Vested shares had a value of $0.2 million for 2020, and $0.9 million for 2019, on their vesting dates. Under our RSU plan, participants are allowed to relinquish shares to pay for their required statutory income taxes.

The outstanding RSUs have a value of $0.5 million based on the March 4, 2021 closing stock price of $1.63.

For the years ended December 31, 2020 and 2019 stock-based compensation was $1.2 million and $1.8 million, respectively. For 2021, based on existing RSUs outstanding, stock-based compensation expense is estimated to be $1.1 million, with nominal amounts of expense in 2022 and 2023.

Stock Options

We have no stock options outstanding.

Stock Bonus Plan

Our stock bonus plan was authorized in late 2009 with 250,000 shares. Currently, we have 86,383 shares available for future issuance.

Note 11 - Employee Benefits

12 Months Ended

Dec. 31, 2020

Compensation and Employee Benefit Plans [Text Block]

(11) EMPLOYEE BENEFITS

We have no defined benefit pension plans or post-retirement benefit plans. We offer our employees a 401(k) Plan, where we match 100% of the first 4% that an employee contributes and a discretionary Deferred Bonus Plan for certain key employees. We also offer health benefits to all employees and their families. We have 2,221 participants in our employee health plan. The plan does not cover dental, vision, short-term or long-term disability. These coverages are available on a voluntary basis. We bear some of the risk of our employee health plans. Our health claims are capped at $200,000 per person with a maximum annual exposure of $19.0 million not including premiums.

Our employee benefit expenses for the years ended December 31 are below (in thousands):

	*2020*		*2019*
Health benefits, including premiums	$	13,173	$	16,228
401(k) matching		1,797		2,510
Deferred bonus plan		679		727
Total	$	15,649	$	19,465

Of the amounts in the above table, $15.0 million and $18.9 million are recorded in operating costs and expenses for 2020 and 2019, respectively with the remainder in SG&A.

Our mine employees are also covered by workers’ compensation and such costs for 2020 and 2019, were approximately $1.9 million and $3.1 million, respectively, and are recorded in operating costs and expenses. Workers’ compensation is a no-fault system by which individuals who sustain work-related injuries or occupational diseases are compensated. Benefits and coverage are mandated by each state which includes disability ratings, medical claims, rehabilitation services, and death and survivor benefits. We are partially self-insured for such claims, however, our operations are protected from these perils through stop-loss insurance policies. Our maximum annual exposure is limited to $1 million per occurrence with a $4 million aggregate deductible. Based on discussions and representations from our insurance carrier, we believe that our reserve for our workers’ compensation benefits is adequate. We have a safety-conscious workforce, and based on our experience modifier, our claims are averaging 24% below that of our peers in underground coal mining in the state of Indiana.

Note 12 - Leases

12 Months Ended

Dec. 31, 2020

Lessee, Operating Leases [Text Block]

(12) LEASES

We have operating leases for office space and processing facilities with remaining lease terms ranging from less than one year to approximately five years. As most of the leases do not provide an implicit rate, we calculated the right-of-use assets and lease liabilities using our secured incremental borrowing rate at the lease commencement date. We currently do not have any finance leases outstanding.

Information related to leases was as follows as of December 31 (in thousands):

	*2020*
Operating lease information:
Operating cash outflows from operating leases	$	235
Weighted average remaining lease term in years		3.18
Weighted average discount rate		6.0	%

Future minimum lease payments under non-cancellable leases as of December 31, 2020 were as follows (in thousands):

Year	*Amount*

2021	$	203
2022		206
2023		173
2024		60
Total minimum lease payments	$	642
Less imputed interest		(40	)

Total operating lease liability	$	602

As reflected on balance sheet:
Other long-term liabilities	$	602

At December 31, 2020, we had approximately $602,000 right-of-use operating lease assets recorded within “buildings and equipment” on the Consolidated Balance Sheet.

Note 13 - Self-insurance

12 Months Ended

Dec. 31, 2020

Self Insurance [Text Block]

(13) SELF INSURANCE

We self-insure our underground mining equipment. Such equipment is allocated among seven mining units dispersed over 10 miles. The historical cost of such equipment was approximately $269 million and $273 million as of December 31, 2020 and December 31, 2019, respectively.

Restricted cash of $4.0 million and $4.5 million as of December 31, 2020, and December 31, 2019, respectively, represents cash held and controlled by a third party and is restricted for future workers’ compensation claim payments.

Note 14 - Net Loss Per Share

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Text Block]

(14) NET LOSS PER SHARE

We compute net loss per share using the two-class method, which is an allocation formula that determines net loss per share for common stock and participating securities, which for us are our outstanding RSUs.

The following table (in thousands, except per share amounts) sets forth the computation of net loss per share:

	*Year Ended December 31,*
	*2020*			*2019*
Numerator:
Net loss	$	(6,220	)	$	(59,854	)
Less loss allocated to RSUs		94			907
Net loss allocated to common shareholders	$	(6,126	)	$	(58,947	)

Denominator:
Weighted average number of common shares outstanding		30,446			30,253

Net loss per share:
Basic and diluted	$	(0.20	)	$	(1.95	)

Note 15 - Fair Value Measurements

12 Months Ended

Dec. 31, 2020

Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]

(15) FAIR VALUE MEASUREMENTS

We account for certain assets and liabilities at fair value. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. We categorize each of our fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. We consider active markets as those in which transactions for the assets or liabilities occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Our marketable securities are Level 1 instruments.

Level 2: Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability. We have no Level 2 instruments.

Level 3: Measured based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable from objective sources (i.e., supported by little or no market activity). Our Level 3 instruments are comprised of fuel hedges, interest rate swaps, and impairment measurements. The fair values of our hedges and swaps were estimated using discounted cash flow calculations based upon forward fuel prices and interest-rate yield curves. The notional values of our two interest rate swaps were $53 million and $68 million as of December 31, 2020, both with maturities of May 2022. Fuel hedges include 1.0 million gallons of diesel fuel that are subject to pricing fluctuations with a minimum of $1.79/gallon and a maximum of $2.00/gallon through December 2021. Although we utilize third-party broker quotes to assess the reasonableness of our prices and valuation, we do not have sufficient corroborating market evidence to support classifying these assets and liabilities as Level 2. The Company also recorded impairments during Q3 of 2020 which incorporate Level 3 non-recurring fair value measures as further discussed in Note 2.

The following table summarizes our financial assets and liabilities measured on a recurring basis at fair value at December 31, 2020 and 2019 by respective level of the fair value hierarchy (in thousands):

	*Level 1*		*Level 2*		*Level 3*		*Total*
December 31, 2020
Liabilities:
Fuel hedge	$	—	$	—	$	297	$	297
Interest rate swaps		—		—		3,893		3,893
	$	—	$	—	$	4,190	$	4,190

December 31, 2019
Assets:
Fuel hedge	$	—	$	—	$	25	$	25
Marketable securities - restricted (Note 4)		2,296		—		—		2,296
	$	2,296	$	—	$	25	$	2,321
Liabilities:
Interest rate swaps	$	—	$	—	$	3,825	$	3,825

The table below highlights the change in fair value of the fuel hedges and interest rate swaps which are based on a discounted future cash flow model (in thousands):

Ending balance, December 31, 2018	$	(1,639	)
Change in estimated fair value		(2,161	)
Ending balance, December 31, 2019		(3,800	)
Change in estimated fair value		(390	)
Ending balance, December 31, 2020*	$	(4,190	)

-------------------------------

*Recorded in accounts payable and accrued liabilities and other liabilities in the Balance Sheet to these Consolidated Financial Statements.

Note 16 - Equity Method Investments

12 Months Ended

Dec. 31, 2020

Equity Method Investments and Joint Ventures Disclosure [Text Block]

(16) EQUITY METHOD INVESTMENTS

Sunrise Energy, LLC

We own a 50% interest in Sunrise Energy, LLC, which owns gas reserves and gathering equipment with plans to develop and operate such reserves. Sunrise Energy also plans to develop and explore for oil, gas, and coal-bed methane gas reserves on or near our underground coal reserves. The carrying value of the investment included in our consolidated balance sheets as of December 31, 2020 and December 31, 2019, was $3.2 million and $3.1 million, respectively.

Sunrise Energy plans to develop and explore for oil, gas, and coal-bed methane gas reserves on or near our underground coal reserves.

Note 17 - Hourglass Sands

12 Months Ended

Dec. 31, 2020

Business Combination Disclosure [Text Block]

(17) HOURGLASS SANDS

In February 2018, we invested $4 million in Hourglass Sands, LLC (Hourglass), a frac sand mining company in the State of Colorado. We own 100% of the Class A units and are consolidating the activity of Hourglass in these statements. Class A units are entitled to 100% of profit until our capital investment and interest is returned, then 90% of profits are allocated to us with remainder to Class B units. We do not own any Class B units.

In February 2018, a Yorktown company associated with one of our directors also invested $4 million in Hourglass in return for a royalty interest in Hourglass. This investment coupled with our $4 million investment brings the initial capitalization of Hourglass to $8 million. We report the royalty interest as a redeemable noncontrolling interest in the consolidated balance sheets. A representative of the Yorktown company holds a seat on the board of managers, and, with a change of control, the Yorktown company may be entitled to receive a portion of the net proceeds realized, as prescribed in the Hourglass operating agreement.

In December 2019, we recorded an impairment to Hourglass Sands of $2.9 million. In August 2020, we ceased operation of the plant and recorded an additional impairment of $1.8 million. See Note 2 to these consolidated financial statements for further discussion.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Consolidation, Policy [Policy Text Block]

Basis of Presentation and Consolidation

The consolidated financial statements include the accounts of Hallador Energy Company (hereinafter known as, “we, us, or our”) and its wholly owned subsidiaries Sunrise Coal, LLC (Sunrise) and Hourglass Sands, LLC (Hourglass), and Sunrise’s wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Sunrise is engaged in the production of steam coal from mines located in western Indiana.

Segment Reporting, Policy [Policy Text Block]

Segment Information

The Company’s significant operating segment includes the two Oaktown underground mines located in southwestern Indiana. The Company’s chief operating decision maker (“CODM”) reviews the operating results, assesses performance and makes decisions about allocation of resources to this segment at the mine level, however, we aggregate the results of operations of the mines for reporting purposes since the nature of the product, production process, customer type, product distribution, and long-term economic characteristics at each mine are similar.

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]

Allowance for Doubtful Accounts

The Company evaluates the need for an allowance for uncollectible receivables based on a review of account balances that are likely to be uncollectible, as determined by such variables as customer creditworthiness, the age of the receivables and disputed amounts. Historically, credit losses have been insignificant. At December 31, 2020 and 2019, no allowance was recorded for uncollectible accounts receivable as all amounts were deemed collectible.

Inventory Supplies, Policy [Policy Text Block]

Inventory

Inventory and parts and supplies are valued at the lower of average cost or net realizable value determined using the first-in first-out method. Inventory costs include labor, supplies, operating overhead, and other related costs incurred at or on behalf of the mining location, including depreciation, depletion, and amortization of equipment, buildings, mineral rights, and mine development costs.

Receivables and Portions of Securitizations that can be Prepaid at Potential Loss, Policy [Policy Text Block]

Prepaid expenses

Prepaid expenses include prepaid insurance, prepaid maintenance expense, and a prepaid balance with our primary parts and supplies vendor.

Advance Royalties [Policy Text Block]

Advanced Royalties

Coal leases that require minimum annual or advance payments and are recoverable from future production are generally deferred and charged to expense as the coal is subsequently produced. Advance royalties are included in other assets.

Mining Properties [Policy Text Block]

Mining Properties

Mining properties are recorded at cost. Interest costs applicable to major asset additions are capitalized during the construction period. Expenditures that extend the useful lives or increase the productivity of the assets are capitalized. The cost of maintenance and repairs that do not extend the useful lives or increase the productivity of the assets are expensed as incurred. Other than land and most mining equipment, mining properties are depreciated using the units-of-production method over the estimated recoverable reserves. Most surface and underground mining equipment is depreciated using estimated useful lives ranging from three to twenty-five years.

If facts and circumstances suggest that a long-lived asset may be impaired, the carrying value is reviewed for recoverability. If this review indicates that the carrying value of the asset will not be recoverable through estimated undiscounted future net cash flows related to the asset over its remaining life, then an impairment loss is recognized by reducing the carrying value of the asset to its estimated fair value. See Note 2 for further discussion of impairments.

Mine Development [Policy Text Block]

Mine Development

Costs of developing new mines, including asset retirement obligation assets, or significantly expanding the capacity of existing mines, are capitalized and amortized using the units-of-production method over estimated recoverable reserves.

Asset Retirement Obligation [Policy Text Block]

Asset Retirement Obligations (ARO) – Reclamation

At the time they are incurred, legal obligations associated with the retirement of long-lived assets are reflected at their estimated fair value, with a corresponding charge to mine development. Obligations are typically incurred when we commence development of underground and surface mines and include reclamation of support facilities, refuse areas and slurry ponds.

Obligations are reflected at the present value of their future cash flows. We reflect accretion of the obligations for the period from the date they are incurred through the date they are extinguished. The ARO assets are amortized using the units-of-production method over estimated recoverable (proved and probable) reserves. We are using credit-adjusted risk-free discount rates ranging from 5.0% to 10% to discount the obligation. Federal and state laws require that mines be reclaimed in accordance with specific standards and approved reclamation plans, as outlined in mining permits. Activities include reclamation of pit and support acreage at surface mines, sealing portals at underground mines, and reclamation of refuse areas and slurry ponds.

We review our ARO at least annually and reflect revisions for permit changes, changes in our estimated reclamation costs and changes in the estimated timing of such costs. In the event we are not able to perform reclamation, we have surety bonds totaling $27 million to cover ARO.

The table below (in thousands) reflects the changes to our ARO:

	*Year Ended December 31,*
	*2020*			*2019*
Balance, beginning of year	$	15,764		$	14,646
Accretion		1,381			1,272
Revisions		—			95
Payments		(868	)		(249	)
Balance, end of year		16,277			15,764
Less current portion		(100	)		(70	)
Long-term balance, end of year	$	16,177		$	15,694

Derivatives, Policy [Policy Text Block]

Interest Rate Swaps

The Company generally utilizes derivative instruments to manage exposures to interest rate risk on long-term debt. The Company enters into interest rate swaps in order to achieve a mix of fixed and variable rate debt that it deems appropriate. These interest rate swaps have not been designated as hedging instruments and are accounted for as an asset or a liability in the accompanying Consolidated Balance Sheets at their fair value. Realized gains and losses are classified as operating activities in the accompanying Consolidated Statements of Cash Flows.

Statement of Cash Flows [Policy Text Block]

Statement of Cash Flows

Cash equivalents include investments with maturities when purchased of three months or less.

Income Tax, Policy [Policy Text Block]

Income Taxes

Income taxes are provided based on the liability method of accounting. The provision for income taxes is based on pretax financial income. Deferred tax assets and liabilities are recognized for the future expected tax consequences of temporary differences between income tax and financial reporting and principally relate to differences in the tax basis of assets and liabilities and their reported amounts, using enacted tax rates in effect for the year in which differences are expected to reverse.

Earnings Per Share, Policy [Policy Text Block]

Net Income (Loss) per Share

Basic net income (loss) per share is computed on the basis of the weighted average number of shares of common stock outstanding during the period using the two-class method for our common shares and RSUs which share in the Company’s earnings. Diluted net income (loss) per share is computed on the basis of the weighted average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include restricted stock units and are included in basic net income (loss) per share, using the two-class method.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual amounts could differ from those estimates. The most significant estimates included in the preparation of the financial statements relate to: (i) deferred income tax accounts, (ii) coal reserves, (iii) depreciation, depletion, and amortization, (iv) estimates relating to interest rate swaps, and (v) estimates used in our impairment analysis and measurement of impairments.

Insurance, Long-Duration Contract [Policy Text Block]

Long-term Contracts

As of December 31, 2020, we are committed to supplying our customers up to a maximum of 21.6 million tons of coal through 2027 of which 13.7 million tons are priced.

For 2020, we derived 79% of our coal sales from four customers, each representing at least 10% of our coal sales. 87% of our accounts receivable was from four customers, each representing more than 10% of the December 31, 2020 balance.

For 2019, we derived 70% of our coal sales from four customers, each representing at least 10% of our coal sales. 68% of our accounts receivable was from three customers, each representing more than 10% of the December 31, 2019 balance.

Share-based Payment Arrangement [Policy Text Block]

Stock-based Compensation

Stock-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense over the applicable vesting period of the stock award (generally two to four years) using the straight-line method.

Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Asset Retirement Obligations [Table Text Block]

	*Year Ended December 31,*
	*2020*			*2019*
Balance, beginning of year	$	15,764		$	14,646
Accretion		1,381			1,272
Revisions		—			95
Payments		(868	)		(249	)
Balance, end of year		16,277			15,764
Less current portion		(100	)		(70	)
Long-term balance, end of year	$	16,177		$	15,694

Note 4 - Other Long-term Assets (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Other Assets, Noncurrent [Table Text Block]

	*December 31,*
	*2020*		*2019*
Advanced coal royalties	$	6,449	$	6,105
Marketable equity securities available for sale, at fair value (restricted)*		—		2,296
Other		1,809		1,923
Total other assets	$	8,258	$	10,324

Note 5 - Bank Debt (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Debt [Table Text Block]

	*December 31,*
	*2020*			*2019*
Current bank debt	$	36,750		$	34,912
Less unamortized debt issuance cost		(2,439	)		(1,868	)
Net current portion	$	34,311		$	33,044

Long-term bank debt	$	100,988		$	145,238
Less unamortized debt issuance cost		(3,681	)		(4,644	)
Net long-term portion	$	97,307		$	140,594

Total bank debt	$	137,738		$	180,150
Less total unamortized debt issuance cost		(6,120	)		(6,512	)
Net bank debt	$	131,618		$	173,638

Schedule of Line of Credit Facilities [Table Text Block]

Fiscal Periods Ending		*Ratio*
December 31, 2020		3.50 to 1.00
March 31, 2021 and June 30, 2021		3.25 to 1.00
September 30, 2021 and December 31, 2021		3.00 to 1.00
March 31, 2022 and each fiscal quarter thereafter		2.50 to 1.00

Schedule of Maturities of Long-term Debt [Table Text Block]

Future Maturities (in thousands):
2021		36,750
2022		25,725
2023		75,263
Total	$	137,738

Note 6 - Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	*December 31,*
	*2020*		*2019*
Accounts payable	$	14,785	$	16,115
Accrued property taxes		2,566		2,835
Accrued payroll		1,621		2,151
Workers' compensation reserve		2,988		3,446
Group health insurance		1,800		2,500
Other		7,649		4,753
Total accounts payable and accrued liabilities	$	31,409	$	31,800

Note 8 - Other Operating Income (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Other Operating Income (Expense) [Table Text Block]

	*Year Ended December 31,*
	*2020*		*2019*
Equity income (loss) - Sunrise Energy	$	1,054	$	(527	)
MSHA reimbursements		400		575
Gain on sale of royalty interests in oil properties		—		2,949
Miscellaneous		1,757		3,029
	$	3,211	$	6,026

Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	*2020*			*2019*
Expected amount	$	(1,865	)	$	(17,262	)
State income taxes, net of federal benefit		(644	)		(3,831	)
Percentage depletion		(2,154	)		(1,475	)
Valuation allowance		1,275			—
Stock-based compensation		67			326
Return to provision adjustments		(60	)		(78	)
Other		723			(27	)
	$	(2,658	)	$	(22,347	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	*2020*			*2019*
Long-term deferred tax assets:
Net operating loss	$	24,081		$	18,956
Valuation allowance		(1,275	)		—
Interest limitation carryforward		—			1,801
Capital loss carryforward		525			555
Alternative minimum tax credit		—			524
Stock-based compensation		179			135
Other		529			1,029
Total long-term deferred tax assets:		24,039			23,000
Coal properties		(26,863	)		(27,884	)
Net deferred tax liability	$	(2,824	)	$	(4,884	)

Note 10 - Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Nonvested Restricted Stock Shares Activity [Table Text Block]

Total authorized RSUs in Plan approved by shareholders	4,850,000
Stock issued out of the Plan from vested grants	(3,091,049	)
Non-vested grants	(324,250	)
RSUs available for future issuance	1,434,701

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

Non-vested grants at December 31, 2018	789,250
Granted – weighted average share price on grant date was $3.98	17,000
Vested – weighted average share price on vesting date was $2.95	(297,250	)
Forfeited	(20,500	)
Non-vested grants at December 31, 2019	488,500
Granted – weighted average share price on grant date was $.90	40,000
Vested – weighted average share price on vesting date was $.92	(193,250	)
Forfeited	(11,000	)
Non-vested grants at December 31, 2020	324,250

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

Vesting Year	*RSUs Vesting*
2021		305,250
2022		9,000
2023		10,000
		324,250

Note 11 - Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Expected Benefit Payments [Table Text Block]

	*2020*		*2019*
Health benefits, including premiums	$	13,173	$	16,228
401(k) matching		1,797		2,510
Deferred bonus plan		679		727
Total	$	15,649	$	19,465

Note 12 - Leases (Tables)

12 Months Ended

Dec. 31, 2020

Lease, Cost [Table Text Block]

	*2020*
Operating lease information:
Operating cash outflows from operating leases	$	235
Weighted average remaining lease term in years		3.18
Weighted average discount rate		6.0	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Year	*Amount*

2021	$	203
2022		206
2023		173
2024		60
Total minimum lease payments	$	642
Less imputed interest		(40	)

Total operating lease liability	$	602

As reflected on balance sheet:
Other long-term liabilities	$	602

Note 14 - Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	*Year Ended December 31,*
	*2020*			*2019*
Numerator:
Net loss	$	(6,220	)	$	(59,854	)
Less loss allocated to RSUs		94			907
Net loss allocated to common shareholders	$	(6,126	)	$	(58,947	)

Denominator:
Weighted average number of common shares outstanding		30,446			30,253

Net loss per share:
Basic and diluted	$	(0.20	)	$	(1.95	)

Note 15 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	*Level 1*		*Level 2*		*Level 3*		*Total*
December 31, 2020
Liabilities:
Fuel hedge	$	—	$	—	$	297	$	297
Interest rate swaps		—		—		3,893		3,893
	$	—	$	—	$	4,190	$	4,190

December 31, 2019
Assets:
Fuel hedge	$	—	$	—	$	25	$	25
Marketable securities - restricted (Note 4)		2,296		—		—		2,296
	$	2,296	$	—	$	25	$	2,321
Liabilities:
Interest rate swaps	$	—	$	—	$	3,825	$	3,825

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Ending balance, December 31, 2018	$	(1,639	)
Change in estimated fair value		(2,161	)
Ending balance, December 31, 2019		(3,800	)
Change in estimated fair value		(390	)
Ending balance, December 31, 2020*	$	(4,190	)

Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands, T in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) T	Dec. 31, 2019 USD ($)
Accounts Receivable, Allowance for Credit Loss, Ending Balance \| $	$ 0	$ 0
Surety bonds \| $	$ 27,000
Coal Supply Commitment (US Ton) \| T	21.6
Year Supply Commitments End	2027
Priced Coal Supply Commitment (US Ton) \| T	13.7
Revenue, Product and Service Benchmark [Member] \| Customer Concentration Risk [Member] \| Coal [Member]
Number of Major Customers	4	4
Revenue, Product and Service Benchmark [Member] \| Customer Concentration Risk [Member] \| Four Customers [Member] \| Coal [Member]
Concentration Risk, Percentage	79.00%	70.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Coal [Member]
Number of Major Customers	4	3
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Four Customers [Member] \| Coal [Member]
Concentration Risk, Percentage	87.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Three Customers [Member] \| Coal [Member]
Concentration Risk, Percentage		68.00%
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	2 years
Minimum [Member] \| Measurement Input, Discount Rate [Member]
ARO measurement input	0.050
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	25 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years
Maximum [Member] \| Measurement Input, Discount Rate [Member]
ARO measurement input	0.10
Southwestern Indiana [Member]
Number of Underground Mines Included in the Significant Operating Segment	2

Note 1 - Summary of Significant Accounting Policies - Changes to Asset Retirement Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance, beginning of year	$ 15,764	$ 14,646
Accretion	1,381	1,272
Revisions	0	95
Payments	(868)	(249)
Balance, end of year	16,277	15,764
Less current portion	(100)	(70)
Long-term balance, end of year	$ 16,177	$ 15,694

Note 2 - Long-lived Asset Impairments (Details Textual) $ in Thousands	1 Months Ended		3 Months Ended				12 Months Ended
	Aug. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Asset Impairment Charges, Total							$ 1,799	$ 77,882
Carlisle Mine [Member]
Asset Impairment Charges, Total						$ 65,700	$ 0
Mineral Properties, Net, Total		$ 1,800				$ 1,800		$ 1,800
Equipment, Redeployed					$ 23,000
Carlisle Mine [Member] \| Closing of Mine [Member]
Restructuring and Related Costs, Incurred Cost, Total				$ 1,100	$ 1,100
Carlisle Mine [Member] \| Measurement Input, Discount Rate [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Asset Impairment, Measurement Input		0.10				0.10		0.10
Bulldog Reserves [Member]
Asset Impairment Charges, Total						$ 9,200
Hourglass Sands [Member]
Asset Impairment Charges, Total	$ 1,800	$ 2,900	$ 1,800					$ 2,900
Mineral Properties, Net, Total		$ 1,900				$ 1,900		$ 1,900

Note 3 - Inventory (Details Textual) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Adjustments, Total	$ 1.6	$ 2.0

Note 4 - Other Long-term Assets - Other Long-term Assets (Details) - USD ($)
$ in Thousands

Dec. 31, 2020

Dec. 31, 2019

Advanced coal royalties

$ 6,449

$ 6,105

Marketable equity securities available for sale, at fair value (restricted)*

^[1]

0

2,296

Other

1,809

1,923

Total other assets

$ 8,258

$ 10,324

[1]	Held by Sunrise Indemnity, Inc., our wholly owned captive insurance company.

Note 5 - Bank Debt (Details Textual) $ in Thousands				9 Months Ended	12 Months Ended
Note 5 - Bank Debt (Details Textual) $ in Thousands	Jan. 08, 2021 USD ($)	Apr. 16, 2020 USD ($)	Apr. 15, 2020 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 30, 2020 USD ($)
Long-term Debt, Gross					$ 137,738	$ 180,150
Debt Issuance Costs, Net, Total					$ 6,120	6,512
Leverage Ratio					2.68
Debt Service Coverage Ratio					1.22
Proceeds from Notes Payable, Total					$ 10,000	0
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate					2.92%
Derivative, Variable Interest Rate					6.42%
Derivative, Amount of Hedged Item					$ 121,000
Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Debt Instrument, Interest Rate, Effective Percentage Unhedged Amount					3.50%
London Interbank Offered Rate (LIBOR) Swap Rate [Member] \| Interest Rate Swap [Member]
Derivative, Basis Spread on Variable Rate					3.50%
Credit Agreement [Member]
Debt Instrument, Covenant, Maximum Annual Capital Expenditures, Remainder of Fiscal Year			$ 30,000
Debt Instrument, Covenant, Maximum Annual Capital Expenditures, Next Fiscal Year and Thereafter			$ 25,000
Debt Instrument, Covenant, Maximum Leverage Ratio for Dividends			2.0
Debt Instrument, Increase (Decrease), Net, Total					$ (42,400)
Long-term Debt, Gross					137,700
Debt Instrument, Unused Borrowing Capacity, Amount					43,800
Debt Instrument, Liquidity					51,800
Letters of Credit Outstanding, Amount					5,700
Debt Issuance Costs, Net, Total			$ 1,900		6,100	$ 6,500	$ 7,900
Debt Instrument, Unhedged Portion					$ 16,700
Credit Agreement [Member] \| Interest Rate Swap [Member]
Derivative, Fixed Interest Rate					2.92%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Variable Rate Floor			0.50%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate			2.75%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate			4.00%
Credit Agreement [Member] \| Through December 31, 2021 [Member]
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio			1.05
Credit Agreement [Member] \| After December 31, 2021 [Member]
Debt Instrument, Covenant, Minimum Debt Service Coverage Ratio			1.25
Credit Agreement [Member] \| Term Loan [Member]
Long-term Debt, Gross					$ 68,000
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity					120,000
Long-term Line of Credit, Total					69,700
Credit Agreement [Member] \| Revolving Credit Facility [Member] \| Interest Rate Swap [Member]
Derivative, Notional Amount					53,000
Paycheck Protection Program CARES Act [Member]
Proceeds from Notes Payable, Total		$ 10,000
Notes Payable, Total					10,000
Notes Payable, Amount of Forgiveness Applied For					$ 10,000
Paycheck Protection Program CARES Act [Member] \| Subsequent Event [Member]
Notes Payable, Amount of Forgiveness Pending	$ 10,000
Forgiveness of Notes Payable, Period from Receipt of Forgiveness Application During Which Lender Will Determine Forgiveness Amount (Day)	90 days
Paycheck Protection Program CARES Act [Member] \| Forecast [Member]
Debt Instrument, Monthly Payment if Debt Instrument is Not Forgiven				$ 1,100

Note 5 - Bank Debt - Bank Debt, Less Debt Issuance Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current bank debt	$ 36,750	$ 34,912
Less unamortized debt issuance cost	(2,439)	(1,868)
Net current portion	34,311	33,044
Long-term bank debt	100,988	145,238
Less unamortized debt issuance cost	(3,681)	(4,644)
Net long-term portion	97,307	140,594
Total	137,738	180,150
Less total unamortized debt issuance cost	(6,120)	(6,512)
Net bank debt	$ 131,618	$ 173,638

Note 5 - Bank Debt - Maximum Leverage Ratio (Details) - Credit Agreement [Member]	Dec. 31, 2020
Periods Ended September 30, 2020 ad December 31, 2020 [Member]
Maximum Leverage Ratio	3.50
Periods Ended March 31, 2021 and June 30, 2021 [Member]
Maximum Leverage Ratio	3.25
Periods Ended September 30, 2021 and December 31, 2021 [Member]
Maximum Leverage Ratio	3.00
Period Ended March 31, 2022 and Thereafter [Member]
Maximum Leverage Ratio	2.50

Note 5 - Bank Debt - Schedule of Future Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
2021	$ 36,750
2022	25,725
2023	75,263
Total	$ 137,738	$ 180,150

Note 6 - Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts payable	$ 14,785	$ 16,115
Accrued property taxes	2,566	2,835
Accrued payroll	1,621	2,151
Workers' compensation reserve	2,988	3,446
Group health insurance	1,800	2,500
Other	7,649	4,753
Total accounts payable and accrued liabilities	$ 31,409	$ 31,800

Note 7 - Revenue 1 (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Liability, Current	$ 0.3
Coal [Member] \| INDIANA \| Revenue from Contract with Customer Benchmark [Member] \| Geographic Concentration Risk [Member]
Concentration Risk, Percentage	74.00%	74.00%

Note 7 - Revenue 2 (Details Textual) $ in Millions	Dec. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 \| Fixed-price Contract [Member]
Revenue, Remaining Performance Obligation, Amount	$ 493
Revenue, Remaining Performance Obligation, Percentage	78.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 \| Contracts with Price Reopeners [Member]
Revenue, Remaining Performance Obligation, Amount	$ 237
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year)	1 year

Note 8 - Other Operating Income - Other Operating Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Equity income (loss) - Sunrise Energy	$ 1,054	$ (527)
MSHA reimbursements	400	575
Gain on sale of royalty interests in oil properties	0	2,949
Miscellaneous	1,757	3,029
Other Operating Income	$ 3,211	$ 6,026

Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Effective Income Tax Rate Reconciliation, Percent, Total	30.00%	27.00%
Deferred Tax Assets, Valuation Allowance, Total	$ 1,275	$ (0)
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	89,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 123,000

Note 9 - Income Taxes - Difference Between Expected Amount and Actual Amount, Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Expected amount	$ (1,865)	$ (17,262)
State income taxes, net of federal benefit	(644)	(3,831)
Percentage depletion	(2,154)	(1,475)
Valuation allowance	1,275	0
Stock-based compensation	67	326
Return to provision adjustments	(60)	(78)
Other	723	(27)
Total income tax benefit	$ (2,658)	$ (22,347)

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

+ References + Details

Note 9 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-term deferred tax assets:
Net operating loss	$ 24,081	$ 18,956
Valuation allowance	(1,275)	0
Interest limitation carryforward	0	1,801
Capital loss carryforward	525	555
Alternative minimum tax credit	0	524
Stock-based compensation	179	135
Other	529	1,029
Total long-term deferred tax assets:	24,039	23,000
Coal properties	(26,863)	(27,884)
Net deferred tax liability	$ (2,824)	$ (4,884)

Note 10 - Stock Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 04, 2021	Dec. 31, 2009
Share-based Payment Arrangement, Expense		$ 1.2	$ 1.8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)		0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		86,383
Forecast [Member]
Share-based Payment Arrangement, Expense	$ 1.1
Subsequent Event [Member]
Share Price (in dollars per share)				$ 1.63
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 0.2	$ 0.9
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		4,850,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		1,434,701
Restricted Stock Units (RSUs) [Member] \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding				$ 0.5

Note 10 - Stock Compensation Plans - Schedule of Restricted Stock Units (Details) - shares	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2009
Total authorized RSUs in Plan approved by shareholders (in shares)				250,000
RSUs available for future issuance (in shares)	86,383
Restricted Stock Units (RSUs) [Member]
Total authorized RSUs in Plan approved by shareholders (in shares)	4,850,000
Stock issued out of the Plan from vested grants (in shares)	(3,091,049)
Non-vested grants (in shares)	(324,250)	(488,500)	(789,250)
RSUs available for future issuance (in shares)	1,434,701

Note 10 - Stock Compensation Plans - RSU Activity (Details) - Restricted Stock Units (RSUs) [Member] - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Non-vested grants (in shares)	488,500	789,250
Granted (in shares)	40,000	17,000
Vested (in shares)	(193,250)	(297,250)
Forfeited (in shares)	(11,000)	(20,500)
Non-vested grants (in shares)	324,250	488,500

Note 10 - Stock Compensation Plans - Vesting of Non-vested RSU Grants (Details) - Restricted Stock Units (RSUs) [Member]	Dec. 31, 2020 shares
RSUs vesting (in shares)	324,250
Vesting in 2021 [Member]
RSUs vesting (in shares)	305,250
Vesting in 2022 [Member]
RSUs vesting (in shares)	9,000
Vesting in 2023 [Member]
RSUs vesting (in shares)	10,000

Note 11 - Employee Benefits (Details Textual)	12 Months Ended
Note 11 - Employee Benefits (Details Textual)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	100.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	4.00%
Participants in Employee Health Plan	2,221
Health Care Cap Per Person	$ 200,000
Insured Capped Maximum Exposure, Health Care	19,000,000.0
Employee Benefit Costs	15,649,000	$ 19,465,000
Workers' compensation costs	1,900,000	3,100,000
Insured Maximum Exposure Per Employee	1,000,000
Aggregate Insurance Deductible for Employees	$ 4,000,000
Percentage Claims Are Below Average of Peers, Underground Coal Mining	24.00%
Operating Expense [Member]
Employee Benefit Costs	$ 15,000,000.0	$ 18,900,000

Note 11 - Employee Benefits - Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Health benefits, including premiums	$ 13,173	$ 16,228
401(k) matching	1,797	2,510
Deferred bonus plan	679	727
Total	$ 15,649	$ 19,465

Note 12 - Leases (Details Textual)	Dec. 31, 2020 USD ($)
Buildings and Equipment [Member]
Operating Lease, Right-of-Use Asset	$ 602,000
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	5 years

Note 12 - Leases - Information Related to Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Operating cash outflows from operating leases	$ 235
Weighted average remaining lease term in years (Year)	3 years 2 months 4 days
Weighted average discount rate	6.00%

Note 12 - Leases - Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2020 USD ($)
2021	$ 203
2022	206
2023	173
2024	60
Total minimum lease payments	642
Less imputed interest	(40)
Other Noncurrent Liabilities [Member]
Total operating lease liability	602
Other long-term liabilities	$ 602

Note 13 - Self-insurance (Details Textual) $ in Thousands	Dec. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($)
Property, Plant and Equipment, Gross, Ending Balance	$ 561,603	$ 550,496
Restricted Cash and Cash Equivalents, Total	4,030	4,512
Future Workers' Compensation Claim Payments [Member]
Restricted Cash and Cash Equivalents, Total	$ 4,000	4,500
Mining Properties and Mineral Rights [Member]
Number of Mining Units	7
Area of Real Estate Property \| item	10
Property, Plant and Equipment, Gross, Ending Balance	$ 269,000	$ 273,000

Note 14 - Net Loss Per Share - Computation of Net Income(Loss) Allocated to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (6,220)	$ (59,854)
Less loss allocated to RSUs	94	907
Net loss allocated to common shareholders	$ (6,126)	$ (58,947)
Weighted average number of common shares outstanding (in shares)	30,446	30,253
Basic and diluted (in dollars per share)	$ (0.20)	$ (1.95)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794

+ Details