CHEGG, INC, 10-Q filed on 4/26/2018
Quarterly Report
v3.8.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2018
Apr. 25, 2018
Document And Entity Information [Abstract]    
Entity Registrant Name CHEGG, INC  
Entity Central Index Key 0001364954  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   112,148,773
v3.8.0.1
CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 106,827 $ 126,457
Short-term investments 82,264 81,742
Accounts receivable, net of allowance for doubtful accounts of $176 and $259 at March 31, 2018 and December 31, 2017, respectively 8,055 10,855
Prepaid expenses 10,799 2,043
Other current assets 6,898 7,845
Total current assets 214,843 228,942
Long-term investments 10,628 20,305
Property and equipment, net 48,197 47,493
Goodwill 125,525 125,272
Intangible assets, net 19,902 21,153
Other assets 4,383 3,765
Total assets 423,478 446,930
Current liabilities    
Accounts payable 3,981 7,049
Deferred revenue 18,625 13,440
Accrued liabilities 26,418 31,074
Total current liabilities 49,024 51,563
Long-term liabilities    
Total other long-term liabilities 4,443 4,305
Total liabilities 53,467 55,868
Commitments and contingencies (Note 8)
Stockholders' equity:    
Preferred stock, $0.001 par value – 10,000,000 shares authorized, no shares issued and outstanding 0 0
Common stock, $0.001 par value 400,000,000 shares authorized; 112,748,665 and 109,667,640 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively 113 110
Additional paid-in capital 764,065 782,845
Accumulated other comprehensive income (loss) 138 (282)
Accumulated deficit (394,305) (391,611)
Total stockholders' equity 370,011 391,062
Total liabilities and stockholders' equity $ 423,478 $ 446,930
v3.8.0.1
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts receivable, current $ 176 $ 259
Preferred stock, par value (in dollars per share) $ 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 (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares issued 112,748,665 109,667,640
Common stock, shares outstanding 112,748,665 109,667,640
v3.8.0.1
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Net revenues: $ 76,949 $ 62,602
Cost of revenues: 20,224 21,396
Gross profit 56,725 41,206
Operating expenses:    
Research and development 25,533 19,302
Sales and marketing 15,336 15,964
General and administrative 18,256 15,342
Restructuring charges 220 900
Gain on liquidation of textbooks 0 (4,766) [1]
Total operating expenses 59,345 46,742
Loss from operations (2,620) (5,536)
Interest expense and other income (expense), net:    
Interest expense, net (20) (19)
Other income (expense), net 564 (199)
Total interest expense and other income (expense), net 544 (218)
Loss before provision for income taxes (2,076) (5,754)
Provision for income taxes 541 647
Net loss $ (2,617) $ (6,401) [1]
Net loss per share, basic and diluted (in dollars per share) $ (0.02) $ (0.07)
Weighted average shares used to compute net loss per share, basic and diluted (in shares) 110,904 92,830
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.
v3.8.0.1
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Comprehensive Income [Abstract]    
Net loss $ (2,617) $ (6,401) [1]
Other comprehensive income:    
Change in net unrealized loss on available for sale investments (91) 0
Change in foreign currency translation adjustments, net of tax 511 99
Other comprehensive income 420 99
Total comprehensive loss $ (2,197) $ (6,302)
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.
v3.8.0.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
[1]
Statement of Cash Flows [Abstract]    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect $ (19,629) $ (6,676)
Cash flows from operating activities    
Net loss (2,617) (6,401)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization expense 5,217 4,389
Share-based compensation expense 11,642 8,278
Gain on liquidation of textbooks 0 (4,766)
Loss from write-offs of textbooks 0 314
Other non-cash items (41) (46)
Change in assets and liabilities:    
Accounts receivable 2,783 1,947
Prepaid expenses and other current assets (7,894) (1,241)
Other assets (506) 72
Accounts payable (3,068) (1,139)
Deferred revenue 5,185 3,270
Accrued liabilities (4,286) (3,743)
Other liabilities 138 260
Net cash provided by operating activities 6,553 1,194
Cash flows from investing activities    
Proceeds from liquidations of textbooks 0 6,943
Purchases of marketable securities (12,511) 0
Maturities of marketable securities 21,630 0
Purchases of property and equipment (4,883) (4,770)
Acquisition of business 0 (188)
Net cash provided by investing activities 4,236 1,985
Cash flows from financing activities    
Common stock issued under stock plans, net 5,222 2,763
Payment of taxes related to the net share settlement of equity awards (35,640) (12,618)
Net cash used in financing activities (30,418) (9,855)
Cash, cash equivalents and restricted cash, beginning of period 126,963 77,433
Cash, cash equivalents and restricted cash, end of period 107,334 70,757
Supplemental cash flow data:    
Interest 19 30
Income taxes 503 388
Non-cash investing and financing activities:    
Accrued purchases of long-lived assets 3,204 2,022
Reconciliation of cash, cash equivalents and restricted cash:    
Total cash, cash equivalents and restricted cash $ 126,963 $ 77,433
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.
v3.8.0.1
Background and Basis of Presentation
3 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Background and Basis of Presentation
Background and Basis of Presentation

Company and Background

Chegg, Inc. (Chegg, the Company, we, us, or our), headquartered in Santa Clara, California, was incorporated as a Delaware corporation in July 2005. Chegg is the smarter way to student. As the leading direct-to-student learning platform, we strive to improve educational outcomes by putting the student first in all our decisions. We support students on their journey from high school to college and into their career with tools designed to help them pass their test, pass their class, and save money on required materials. Our services are available online, anytime and anywhere, so we can reach students when they need us most.

Basis of Presentation

The accompanying condensed consolidated balance sheet as of March 31, 2018, the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive loss and the condensed consolidated statements of cash flows for the three months ended March 31, 2018 and 2017 and the related footnote disclosures are unaudited. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, including normal recurring adjustments, necessary to present fairly our financial position as of March 31, 2018 and our results of operations and cash flows for the three months ended March 31, 2018 and 2017. Our results of operations and cash flows for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the full year.

We operate in a single segment. Our fiscal year ends on December 31 and in this report we refer to the year ended December 31, 2017 as 2017.

The condensed consolidated financial statements and related financial information should be read in conjunction with the audited consolidated financial statements and the related notes thereto that are included in our Annual Report on Form 10-K for the year ended December 31, 2017 (the Annual Report on Form 10-K) filed with the U.S. Securities and Exchange Commission (SEC).

We have changed the caption on our condensed consolidated statements of operations from “technology and development” to “research and development.” This change does not impact any current or previously reported amounts.

Except for our policies on revenue recognition and deferred revenue, there have been no material changes to our significant accounting policies as compared to the significant accounting policies described in our Annual Report on Form 10-K.

Revenue Recognition and Deferred Revenue

We recognize revenues from our Chegg Services and Required Materials offerings when control of the goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services.

We determine revenue recognition through the following steps:

Identification of the contract, or contracts, with a customer
Identification of the performance obligations in the contract
Determination of the transaction price
Allocation of the transaction price to the performance obligations in the contract
Recognition of revenue when, or as, we satisfy a performance obligation

We generate revenues from our Chegg Services product line including our Chegg Study service, our Chegg Writing service, our Chegg Tutors service, Test Prep, through our partnership with Kaplan Test Prep (Kaplan), Internship services, Brand Partnership services that we offer to brands and Enrollment Marketing services to colleges, through our strategic partnership with the National Record Center for College and University Admissions (NRCCUA). Chegg Services are offered to students through weekly, monthly or annual subscriptions, and we recognize revenues ratably over the respective subscription period. Enrollment Marketing services and Brand Partnership services are offered either on a subscription or on an a la carte basis. Revenues are recognized ratably or as earned over the subscription service period, generally one year. Revenues from Enrollment Marketing services or Brand Partnership services delivered on an a la carte basis, without a subscription, are recognized when delivery of the respective lead or service has occurred. Historically, under previous revenue recognition guidance, revenue recognition was delayed for certain contracts with extended payment terms. For these services, we bill the customer at the inception, over the term of the customer arrangement or as the services are performed. Upon satisfactory assessment of creditworthiness, we generally grant credit to our Enrollment Marketing and Brand Partnership customers with normal credit terms, typically 30 days.

Some of our customer arrangements for Brand Partnership and Enrollment Marketing services include multiple performance obligations. We have determined these performance obligations qualify as distinct performance obligations, as the customer can benefit from the service on its own or together with other resources that are readily available to the customer and our promise to transfer the service is separately identifiable from other promises in the contract. For these arrangements that contain distinct performance obligations, we allocate the transaction price based on the relative standalone selling price method by comparing the standalone selling price (SSP) of each distinct performance obligation to the total value of the contract.

We determine the SSP based on our historical pricing and discounting practices for the distinct performance obligation when sold separately. If the SSP is not directly observable, we estimate the SSP by considering information such as market conditions, and information about the customer. Additionally, we limit the amount of revenues recognized for delivered promises to the amount that is not contingent on future delivery of services or other future performance obligations.

We also generate revenues from our Required Materials product line including revenue share earned on print textbooks for rental or sale transactions, owned by Ingram and other partners, which are recognized immediately when a book ships to the student. Revenues from the rental or sale of eTextbooks is recognized ratably over the contractual period, generally two to five months, or at time of the sale, respectively. Our strategic partnership with Ingram includes an amount of variable consideration in addition to a fixed revenue share that we earn. This variable consideration can either increase or decrease the total transaction price depending on the nature of the variable consideration. Under the new revenue recognition guidance, we estimate the amount of variable consideration that we will earn at the inception of the contract, adjusted during each period, and include an estimated amount each period as opposed to the contractual amount earned under the previous revenue recognition guidance.

For sales of third party products, we evaluate whether we are acting as a principal or an agent, and therefore would record the gross sales amount as revenues and related costs or the net amount earned as a revenue share from the sale of third party products. Our determination is based on our evaluation of whether we control the specified goods or services prior to transferring them to the customer. For our strategic partnership with Ingram and our agreements with other textbook publishers, we have concluded that we do not control the use of the print textbooks, and therefore record net revenue only for the revenue share we earn upon the shipment of a print textbook to a student. For the sale of eTextbooks we have concluded that we control the service, therefore we recognize revenue and cost of revenue on a gross basis.

Revenues are presented net of sales tax collected from customers to be remitted to governmental authorities and net of allowances for estimated cancellations and customer returns, which are based on historical data. Customer refunds from cancellations and returns are recorded as a reduction to revenues.

Contract assets are contained within other current assets on our condensed consolidated balance sheets. Contract assets represent the goods or services that we have transferred to a customer before invoicing the customer. Contract receivables are contained within accounts receivable, net on our condensed consolidated balance sheets and represent unconditional consideration that will be received solely due to the passage of time. Contract liabilities are contained within deferred revenue on our condensed consolidated balance sheets. Deferred revenue primarily consists of advanced payments from students related to rentals and subscriptions performance obligations that have not been satisfied, and Brand Partnership and Enrollment Marketing performance obligations that have yet to be satisfied. Deferred revenue is recognized as revenues ratably over the term for subscriptions or when the services are provided and all other revenue recognition criteria have been met.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles in the United States (U.S. GAAP) requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities; the disclosure of contingent liabilities at the date of the financial statements; and the reported amounts of revenues and expenses during the reporting periods. Significant estimates, assumptions, and judgments are used for, but not limited to: revenue recognition including variable consideration, recoverability of accounts receivable, restructuring charges, share-based compensation expense including estimated forfeitures, accounting for income taxes, useful lives assigned to long-lived assets for depreciation and amortization, valuation of goodwill and long-lived assets, and the valuation of acquired intangible assets. We base our estimates on historical experience, knowledge of current business conditions, and various other factors we believe to be reasonable under the circumstances. These estimates are based on management’s knowledge about current events and expectations about actions we may undertake in the future. Actual results could differ from these estimates, and such differences could be material to our financial position and results of operations.

Recent Accounting Pronouncements

Recently Issued Accounting Pronouncements not yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 requires an entity to recognize a right-of-use asset and lease liability for all leases with terms of more than 12 months. Recognition, measurement, and presentation of expenses will depend on classification as a finance or operating lease. The amendments in this update also require certain quantitative and qualitative disclosures about leasing arrangements. Early adoption is permitted, and the guidance requires a modified retrospective adoption. The guidance is effective for annual periods beginning after December 15, 2018 and we plan to adopt the guidance on January 1, 2019. We plan to elect the package of transition practical expedients which include not reassessing whether any expired or existing contracts are or contain leases, not reassessing the lease classification of expired or existing leases, and not reassessing initial direct costs for existing leases. We will continue to evaluate ASU 2016-02 as we near our adoption date.

Recently Adopted Accounting Pronouncements

In February 2018, the FASB issued ASU No. 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. We adopted the guidance on January 1, 2018 recording an immaterial reclassification from accumulated other comprehensive income (loss) to the opening balance of accumulated deficit.

In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. ASU 2017-04 eliminates step 2 from the annual goodwill impairment test no longer requiring the comparison of the implied fair value of a reporting unit's goodwill with the carrying amount of goodwill. We early adopted the guidance with a prospective application on January 1, 2018 and will apply the guidance starting with our 2018 annual goodwill impairment assessment.

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. ASU 2017-01 clarifies the definition of a business to assist entities with evaluating whether a transaction should be accounted for as acquisitions of assets or businesses. We adopted the guidance with a prospective application on January 1, 2018. We will analyze the clarified definition of a business to determine whether transactions from our application date should be accounted for as an asset acquisition or business combination under the new guidance.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. ASU 2016-18 requires an entity to explain the change during a period in restricted cash equivalents on the condensed consolidated statements of cash flows and include such amounts when reconciling beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows. We adopted the guidance with a retrospective application on January 1, 2018 and have adjusted our beginning-of-period and end-of-period amounts on our condensed consolidated statement of cash flows to include restricted cash with the change in restricted cash included within the other assets line on our condensed consolidated statement of cash flows.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires entities to measure equity investments at fair value and recognize any changes in fair value within the statement of operations. We have a strategic investment of $3.0 million recorded in other assets on our condensed consolidated balance sheets that falls under this guidance update. The guidance provides for electing a measurement alternative for equity investments that do not have readily determinable fair values. We have elected the measurement alternative for our strategic investment as there is not a readily determinable fair value, which we will apply to our strategic investment starting with our adoption date of January 1, 2018. This investment will be measured at cost, less any impairment, plus or minus adjustments resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer, with any changes in the value of the investment recorded within the statement of operations.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, as amended (Topic 606) (ASC 606), which changes the way we recognize revenue and significantly expands the disclosure requirements for revenue arrangements.

We adopted ASU 2014-09 under the modified retrospective application, recording the cumulative effect of adoption as an adjustment to the opening balance of accumulated deficit on our adoption date of January 1, 2018. We have not adjusted previously reported amounts. Adoption of the new standard resulted in changes to our accounting policies for revenue recognition, and trade and other receivables. See note 2 for more information.
v3.8.0.1
Net Loss Per Share
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Net Loss Per Share
et Loss Per Share

Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including stock options, warrants, restricted stock units (RSUs), and performance-based restricted stock units (PSUs), to the extent dilutive. Basic and diluted net loss per share was the same for each period presented as the inclusion of all potential common shares outstanding would have been anti-dilutive.

The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share amounts):
 
Three Months Ended March 31,
 
2018
 
2017
Numerator:
 
 
 
Net loss
$
(2,617
)
 
$
(6,401
)
Denominator:
 
 
 
Weighted average shares used to compute net loss per share, basic and diluted
110,904

 
92,830

 
 
 
 
Net loss per share, basic and diluted
$
(0.02
)
 
$
(0.07
)


The following potential weighted-average shares of common stock outstanding were excluded from the computation of diluted net loss per share because including them would have been anti-dilutive (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Options to purchase common stock
4,079

 
7,975

RSUs and PSUs
8,791

 
1,888

Warrants to purchase common stock

 
200

Total common stock equivalents
12,870

 
10,063

v3.8.0.1
Revenues
3 Months Ended
Mar. 31, 2018
Revenue from Contract with Customer [Abstract]  
Revenues
Revenues

Adoption of ASC Topic 606, Revenue from Contracts with Customers

On January 1, 2018, we adopted the new revenue recognition guidance using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning January 1, 2018 are presented under the new revenue recognition guidance, while prior period amounts were not adjusted and continue to be reported in accordance with the previous revenue recognition guidance.

We recorded an immaterial net increase to the opening balance of accumulated deficit as of January 1, 2018 due to the cumulative impact of adopting the new revenue recognition guidance. The two primary impacts of the new revenue recognition guidance are for our Enrollment Marketing services where revenue is recognized earlier in the contract life under the new revenue recognition guidance than under the previous guidance and for our strategic partnership with Ingram where we are required to estimate variable consideration under the new revenue recognition guidance, which we were not previously required to estimate. Both of these changes had an immaterial impact on our revenue under the new revenue recognition guidance during the three months ended March 31, 2018 as compared to the previous revenue recognition guidance.

Revenue Recognition

Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. The majority of our revenues are recognized over time as services are performed, with certain revenues, most significantly the revenue share we earn from Ingram and other partners, being recognized at the point in time when print textbooks are shipped to students.

The following table sets forth our total net revenues for the periods shown disaggregated for our Chegg Services and Required Materials product lines (in thousands, except percentages):
 
Three Months Ended 
 March 31,
 
Change
 
2018
 
2017(1)
 
$
 
%
Chegg Services
$
56,277

 
$
41,035

 
$
15,242

 
37
 %
Required Materials
20,672

 
21,567

 
(895
)
 
(4
)%
Total net revenues
$
76,949

 
$
62,602

 
$
14,347

 
23
 %

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.

During the three months ended March 31, 2018, we recognized $9.6 million of revenues that were included in our deferred revenue balance as of December 31, 2017. During the three months ended March 31, 2018, there were no revenues recognized from performance obligations satisfied in previous periods. The aggregate amount of unsatisfied performance obligations is approximately $27.1 million as of March 31, 2018, of which a majority is expected to be recognized into revenues over the next year and the remainder within three years. As a practical expedient, we do not disclose the value of unsatisfied performance obligations for contracts with an expected duration of one year or less.

Contract Balances

The following table presents our accounts receivable, net and deferred revenue balances (in thousands, except percentages):
 
 
 
Change
 
March 31, 2018
 
December 31, 2017
 
$
 
%
Accounts receivable, net
$
8,055

 
$
10,855

 
$
(2,800
)
 
(26
)%
Deferred revenue
$
18,625

 
$
13,440

 
$
5,185

 
39
 %


During the three months ended March 31, 2018, our accounts receivable, net balance decreased by $2.8 million, or 26%, primarily due to an improvement in cash collections. Deferred revenue balance increased by $5.2 million, or 39%, primarily due to increased bookings for our Chegg Study service and eTextbook rentals.

Our contract assets balance was immaterial as of March 31, 2018 and December 31, 2017.
v3.8.0.1
Cash and Cash Equivalents, and Investment
3 Months Ended
Mar. 31, 2018
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents, and Investment
ash and Cash Equivalents, and Investments
 
The following table shows our cash and cash equivalents, and investments’ cost, net unrealized loss and fair value as of March 31, 2018 and December 31, 2017 (in thousands):
 
March 31, 2018
 
December 31, 2017
 
Cost
 
Net Unrealized Loss
 
Fair Value
 
Cost
 
Net Unrealized Loss
 
Fair Value
Cash and cash equivalents:
 
 
 
 
 
 
 
 
 
 
 
Cash
$
69,117

 
$

 
$
69,117

 
$
98,370

 
$

 
$
98,370

Money market funds
5,192

 

 
$
5,192

 
5,358

 

 
5,358

Commercial paper
32,516

 
2

 
32,518

 
22,729

 

 
22,729

Total cash and cash equivalents
$
106,825

 
$
2

 
$
106,827

 
$
126,457

 
$

 
$
126,457

Short-term investments:
 
 
 
 
 
 
 
 
 
 
 
Commercial paper
$
31,340

 
$
(17
)
 
$
31,323

 
$
38,850

 
$
(27
)
 
$
38,823

Corporate securities
31,103

 
(142
)
 
30,961

 
23,001

 
(43
)
 
22,958

U.S. treasury securities
19,992

 
(12
)
 
19,980

 
19,978

 
(17
)
 
19,961

Total short-term investments
$
82,435

 
$
(171
)
 
$
82,264

 
$
81,829

 
$
(87
)
 
$
81,742

 
 
 
 
 
 
 
 
 
 
 
 
Long-term corporate securities
$
10,735

 
$
(107
)
 
$
10,628

 
$
20,405

 
$
(100
)
 
$
20,305


 
The cost and fair value of available-for-sale investments as of March 31, 2018 by contractual maturity were as follows (in thousands):
 
Cost
 
Fair Value
Due in 1 year or less
$
114,951

 
$
114,782

Due in 1-2 years
10,735

 
10,628

Investments not due at a single maturity date
5,192

 
5,192

Total
$
130,878

 
$
130,602



Investments not due at a single maturity date in the preceding table consist of money market fund deposits.

As of March 31, 2018, we considered the declines in market value of our investment portfolio to be temporary in nature and did not consider any of our investments to be other-than-temporarily impaired. We do not intend to sell the investments nor is it more likely than not that we will be required to sell the investments before recovery of their cost bases. We typically invest in highly-rated securities with a minimum credit rating of A- and a weighted average maturity of four months, and our investment policy generally limits the amount of credit exposure to any one issuer. The policy requires investments generally to be investment grade, with the primary objective of preserving capital and maintaining liquidity. Fair values were determined for each individual security in the investment portfolio. When evaluating an investment for other-than-temporary impairment, we review factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, changes in market interest rates and our intent to sell, or whether it is more likely than not it will be required to sell, the investment before recovery of the investment’s cost basis. During the three months ended March 31, 2018 and 2017, we did not recognize any impairment charges.

Restricted Cash

As of March 31, 2018 and December 31, 2017, we had approximately $0.5 million of restricted cash that consists of security deposits for our offices. These amounts are classified in either other current assets and other assets on our condensed consolidated balance sheets based on the remaining term of the lease from the balance sheet dates.

Strategic Investment

We previously invested $3.0 million in a foreign entity to explore expanding our reach internationally. Our investment is included in other assets on our condensed consolidated balance sheets. We did not record an impairment charge on this investment during the three months ended March 31, 2018 and 2017, as there were no significant identified events or changes in circumstances that would be considered an indicator for impairment. Further, there were no observable price changes in orderly transactions for the identical or a similar investment of the same issuer during the three months ended March 31, 2018.
v3.8.0.1
Fair Value Measurement
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurement
air Value Measurement

We have established a fair value hierarchy used to determine the fair value of our financial instruments as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.

Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value; the inputs require significant management judgment or estimation.

A financial instrument’s classification within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

Financial instruments measured and recorded at fair value on a recurring basis as of March 31, 2018 and December 31, 2017 are classified based on the valuation technique level in the tables below (in thousands):
 
March 31, 2018
 
Total
 
Quoted Prices
in Active
Markets for Identical
Assets
(Level 1)
 
Significant
Other Observable
Inputs (Level 2)
Assets:
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
Money market funds
$
5,192

 
$
5,192

 
$

Commercial paper
32,518

 

 
32,518

Short-term investments:
 
 
 
 
 
Commercial paper
31,323

 

 
31,323

Corporate securities
30,961

 

 
30,961

U.S. treasury securities
19,980

 
19,980

 

Long-term corporate securities
10,628

 

 
10,628

Total assets measured and recorded at fair value
$
130,602

 
$
25,172

 
$
105,430


 
December 31, 2017
 
Total
 
Quoted Prices
in Active
Markets for Identical
Assets
(Level 1)
 
Significant 
Other Observable 
Inputs (Level 2)
Assets:
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
Money market funds
$
5,358

 
$
5,358

 
$

Commercial paper
22,729

 

 
22,729

Short-term investments:

 
 
 
 
Commercial paper
38,823

 

 
38,823

Corporate securities
22,958

 

 
22,958

U.S. treasury securities
19,961

 
19,961

 

Long-term corporate securities
20,305

 

 
20,305

Total assets measured and recorded at fair value
$
130,134

 
$
25,319

 
$
104,815


 
We value our marketable securities based on quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs) in determining fair value. Other than our U.S. treasury securities, we classify our fixed income available-for-sale securities as having Level 2 inputs. The valuation techniques used to measure the fair value of our financial instruments having Level 2 inputs were derived from non-binding market consensus prices that are corroborated by observable market data, quoted market prices for similar instruments, or pricing models such as discounted cash flow techniques.

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.
v3.8.0.1
Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
oodwill and Intangible Assets

Goodwill consists of the following (in thousands):
 
Three Months Ended 
 March 31, 2018
 
Year Ended December 31, 2017
Beginning balance
$
125,272

 
$
116,239

Additions due to acquisition

 
9,024

Foreign currency translation adjustment
253

 
9

Ending balance
$
125,525

 
$
125,272



Intangible assets as of March 31, 2018 and December 31, 2017 consist of the following (in thousands, except the weighted-average amortization period in months):
 
March 31, 2018
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,852
)
 
$
9,805

Customer lists
47

 
9,970

 
(5,822
)
 
4,148

Trade names
46

 
5,793

 
(3,860
)
 
1,933

Non-compete agreements
30

 
1,798

 
(1,554
)
 
244

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
172

 

 
172

Total intangible assets
57

 
$
43,020

 
$
(23,118
)
 
$
19,902

 
 
December 31, 2017
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,220
)
 
$
10,437

Customer lists
47

 
9,970

 
(5,480
)
 
4,490

Trade names
46

 
5,793

 
(3,465
)
 
2,328

Non-compete agreements
30

 
1,798

 
(1,506
)
 
292

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
6

 

 
6

Total intangible assets
57

 
$
42,854

 
$
(21,701
)
 
$
21,153



During each the three months ended March 31, 2018 and 2017, amortization expense related to our acquired intangible assets totaled approximately $1.4 million.

As of March 31, 2018, the estimated future amortization expense related to our finite-lived intangible assets is as follows (in thousands):
Remaining nine months of 2018
$
3,893

2019
4,347

2020
2,874

2021
1,518

2022
1,075

Thereafter
2,595

Total
$
16,302

v3.8.0.1
Debt Obligations
3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]  
Debt Obligations
ebt Obligations

In September 2016, we entered into a revolving line of credit, which was amended in March 2018, with an aggregate principal amount of $30.0 million (the Line of Credit) with an accordion feature that, subject to the lender's discretion, allows us to borrow up to a total of $50.0 million. This new line of credit replaced the previous line of credit that expired in August 2016. The Line of Credit matures September 2019 and requires us to repay the outstanding balance upon maturity. We will pay a fee equal to 0.25% per year on the average daily unused amount of the Line of Credit and a base interest rate equal to the LIBOR. In addition, we will pay a fee for each issued letter of credit which will be determined based on our current leverage ratio at the time the letter of credit is issued. If our leverage ratio is less than 1.00%, we will pay a fee equal to 1.50% per year and if our leverage ratio is greater than or equal to 1.00%, we will pay a fee equal to 2.50% per year. Our leverage ratio is a ratio of all obligations owed to the bank divided by our consolidated EBITDA. EBITDA for the purposes of calculating our leverage ratio is defined as net profit (loss) before tax, plus interest expense and amortized debt issuance costs, plus non-cash stock compensation (net of capitalized interest expense), plus depreciation expense, plus amortization expense and other non-cash expenses (assuming there are no future cash costs), plus expenses incurred in connection with permitted acquisitions (including without limitation accrued acquisition-related contingent expenses) in an amount not to exceed $6.0 million per calendar year, plus non-recurring expenses in an amount not to exceed $2.0 million per calendar year. We must maintain financial covenants under the Line of Credit as follows: (1) maintain a balance of unrestricted cash at the lender of not less than $30.0 million at all times, other than the three months ending March 31, 2017 and June 30, 2017, and not less than $25.0 million during the three months ending March 31, 2017 and June 30, 2017; and (2) achieve EBITDA, on a trailing 12 month basis, of not less than (i) $25.0 million for the period of time from September 30, 2016 through June 30, 2017, (ii) $30.0 million for the period of time from September 30, 2017 through June 30, 2018, and (iii) $35.0 million for the period of time from September 30, 2018 through the maturity of the Line of Credit. As of March 31, 2018, we were in compliance with the financial covenants of the Line of Credit. Further, we had no amounts outstanding and were able to borrow up to $30.0 million under the Line of Credit.
v3.8.0.1
Commitments and Contingencies
3 Months Ended
Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
ommitments and Contingencies

We lease our offices under operating leases, which expire at various dates through 2022. Our primary operating lease commitments at March 31, 2018 are related to our headquarters in Santa Clara, California and our office in San Francisco, California. We recognize rent expense on a straight-line basis over the lease period. Where leases contain escalation clauses, rent abatements, or concessions, such as rent holidays and landlord or tenant incentives or allowances, we apply them in the determination of straight-line rent expense over the lease term. Rental expense, net of sublease income, was approximately $0.6 million and $0.7 million in the three months ended March 31, 2018 and 2017, respectively.

From time to time, third parties may assert patent infringement claims against us in the form of letters, litigation, or other forms of communication. In addition, we may from time to time be subject to other legal proceedings and claims in the ordinary course of business, including claims of alleged infringement of trademarks, copyrights, and other intellectual property rights; employment claims; and general contract or other claims. We may also, from time to time, be subject to various legal or government claims, disputes, or investigations. Such matters may include, but not be limited to, claims, disputes, or investigations related to warranty, refund, breach of contract, employment, intellectual property, government regulation, or compliance or other matters.

We are not aware of any other pending legal matters or claims, individually or in the aggregate, that are expected to have a material adverse impact on our consolidated financial position, results of operations, or cash flows. However, our determination of whether a claim will proceed to litigation cannot be made with certainty, nor can the results of litigation be predicted with certainty. Nevertheless, defending any of these actions, regardless of the outcome, may be costly, time consuming, distract management personnel, and have a negative effect on our business. An adverse outcome in any of these actions, including a judgment or settlement, may cause a material adverse effect on our future business, operating results, and/or financial condition.
v3.8.0.1
Guarantees and Indemnifications
3 Months Ended
Mar. 31, 2018
Guarantees And Indemnifications [Abstract]  
Guarantees and Indemnifications
uarantees and Indemnifications

We have agreed to indemnify our directors and officers for certain events or occurrences, subject to certain limits, while such persons are or were serving at our request in such capacity. We may terminate the indemnification agreements with these persons upon termination of employment, but termination will not affect claims for indemnification related to events occurring prior to the effective date of termination. We have a directors’ and officers’ insurance policy that limits our potential exposure up to the limits of our insurance coverage. In addition, we also have other indemnification agreements with various vendors against certain claims, liabilities, losses, and damages. The maximum amount of potential future indemnification is unlimited.

We believe the fair value of these indemnification agreements is immaterial. We have not recorded any liabilities for these agreements as of March 31, 2018.
v3.8.0.1
Stockholders' Equity
3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stockholders' Equity
tockholders' Equity

Share-based Compensation Expense

Total share-based compensation expense recorded for employees and non-employees, is as follows (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Cost of revenues
$
94

 
$
67

Research and development
4,133

 
3,241

Sales and marketing
1,589

 
1,126

General and administrative
5,826

 
3,844

Total share-based compensation expense
$
11,642

 
$
8,278



There was no capitalized share-based compensation expense as of March 31, 2018 or 2017.

RSU and PSU Activity

Activity for RSUs and PSUs is as follows:
 
 
RSUs and PSUs Outstanding
 
Number of RSUs and PSUs
Outstanding
 
Weighted 
Average Grant Date 
Fair Value
Balance at December 31, 2017
14,335,115

 
$
6.78

Granted
2,600,433

 
19.55

Released
(4,203,190
)
 
6.19

Canceled
(683,587
)
 
5.34

Balance at March 31, 2018
12,048,771

 
$
9.83



As of March 31, 2018, our total unrecognized share-based compensation expense related to RSUs and PSUs was approximately $81.3 million, which will be recognized over the remaining weighted-average vesting period of approximately 1.9 years.
v3.8.0.1
Income Taxes
3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]  
Income Taxes
come Taxes

We recorded an income tax provision of approximately $0.5 million and $0.6 million for the three months ended March 31, 2018 and 2017, respectively, primarily due to state and foreign income tax expense and federal tax expense related to acquired indefinite lived intangible assets.

On December 22, 2017, Staff Accounting Bulletin No. 118 (SAB 118) was issued to address the application of US GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed in reasonable detail to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act (Tax Act). In accordance with SAB 118, as of March 31, 2018, we had not yet completed our accounting for the tax effects of the enactment of the Tax Act. Our estimate of the effects the Tax Act have not materially changed from the amounts recorded during the year ended December 31, 2017.  We will continue to analyze certain aspects of the Tax Act and the newly issued Internal Revenue Service notifications and we expect future notices may continue to impact and refine our estimates.
v3.8.0.1
Restructuring Charges
3 Months Ended
Mar. 31, 2018
Restructuring and Related Activities [Abstract]  
Restructuring Charges
estructuring Charges

2017 Restructuring Plan

In January 2017, we entered into a strategic partnership with NRCCUA where they will assume responsibility for managing, renewing, and maintaining our existing university contracts and become the exclusive reseller of our digital Enrollment Marketing services for colleges and universities. As a result of this strategic partnership, approximately 50 employees in China and the United States supporting the sales and account support functions of our Enrollment Marketing offering were terminated. Costs incurred to date are expected to be fully paid within 6 months.

2015 Restructuring Plan

Restructuring charges of $0.2 million recorded during the three months ended March 31, 2018 primarily related to our subtenant filing for bankruptcy and exiting our leased office. Costs incurred to date are expected to be fully paid by 2021.

The following table summarizes the activity related to the accrual for restructuring charges (credits) (in thousands):
 
2017 Restructuring Plan
 
2015 Restructuring Plan
 
 
 
Workforce Reduction Costs
 
Lease Termination and Other Costs
 
Workforce Reduction Costs
 
Lease Termination and Other Costs
 
Total
Balance at January 1, 2017
$

 
$

 
$

 
$
306

 
$
306

Restructuring charges (credits)
941

 
148

 

 
(42
)
 
1,047

Cash payments
(897
)
 
(128
)
 

 
(43
)
 
(1,068
)
Write-offs

 
(20
)
 

 

 
(20
)
Balance at December 31, 2017
44

 

 

 
221

 
265

Restructuring charges
31

 
9

 

 
180

 
220

Cash payments

 
(9
)
 

 
(57
)
 
(66
)
Write-offs

 

 

 
(18
)
 
(18
)
Balance at March 31, 2018
$
75

 
$

 
$

 
$
326

 
$
401



As of March 31, 2018, the $0.4 million liability was comprised of a short-term accrual of $0.3 million included within accrued liabilities and a long-term accrual of $0.1 million included within other liabilities on our condensed consolidated balance sheet.
v3.8.0.1
Related-Party Transactions
3 Months Ended
Mar. 31, 2018
Related Party Transactions [Abstract]  
Related-Party Transactions
elated-Party Transactions

Our Chief Executive Officer is a member of the Board of Directors of Adobe Systems Incorporated (Adobe). During the three months ended March 31, 2018 and March 31, 2017, we had purchases of $1.7 million and $0.5 million, respectively, from Adobe. We had $0.1 million of revenues during the three months ended March 31, 2018 and no revenues during the three months ended March 31, 2017 from Adobe. We had $0.6 million and $0.3 million in payables as of March 31, 2018 and December 31, 2017, respectively, to Adobe. We no accounts receivables as of March 31, 2018 and an immaterial amount of accounts receivable as of December 31, 2017 from Adobe.

One of our board members is also a member of the Board of Directors of Cengage Learning, Inc. (Cengage).  During the three months ended March 31, 2018 and March 31, 2017, we had purchases of $5.1 million and $3.5 million, respectively, from Cengage.  We had $1.9 million and $0.4 million of revenues during the three months ended March 31, 2018 and March 31, 2017, respectively, from Cengage. We had $0.6 million and $0.1 million in payables as of March 31, 2018 and December 31, 2017, respectively, to Cengage. We had no outstanding receivables as of March 31, 2018 and $0.3 million in outstanding receivables as of December 31, 2017 from Cengage.

The immediate family of one of our board members is also a member of the Board of Directors of PayPal Holdings, Inc. (PayPal). During the three months ended March 31, 2018 and March 31, 2017, we incurred payment processing fees of $0.4 million and $0.3 million, respectively, to PayPal.
v3.8.0.1
Subsequent Event Subsequent Event
3 Months Ended
Mar. 31, 2018
Subsequent Events [Abstract]  
Subsequent Event
Subsequent Event

On April 3, 2018, we closed an offering of our 0.25% convertible senior notes due 2023 for gross proceeds of $345.0 million, which included the full exercise of the option held by the initial purchasers to purchase $45 million of additional notes. The notes are our senior, unsecured obligations and bear cash interest of 0.25% per year, payable semi-annually in arrears on May 15 and November 15 of each year, beginning on November 15, 2018. The net proceeds from the offering are approximately $335.6 million, after deducting the initial purchasers’ discount and estimated offering expenses payable by us.

The notes will mature on May 15, 2023, unless repurchased, redeemed or converted in accordance with their terms prior to such date. Prior to February 15, 2023, the notes are convertible at the option of holders only upon satisfaction of certain conditions and during certain periods, and thereafter, at any time until the close of business on the second scheduled trading day immediately preceding the maturity date. Upon conversion, the notes may be settled in shares of our common stock, cash or a combination of cash and shares of our common stock, at our election. We may not redeem the notes prior to May 20, 2021. The notes have an initial conversion rate of 37.1051 shares of our common stock per $1,000 principal amount of notes (which is subject to adjustment in certain circumstances). This is equivalent to an initial conversion price of approximately $26.95 per share which represented a premium of approximately 32.5% to the $20.34 per share closing price of our common stock on The New York Stock Exchange on March 28, 2018.

We used approximately $39.2 million of the net proceeds from the offering of the notes to pay for the cost of privately negotiated capped call transactions with certain financial institutions, which are expected generally to reduce or offset potential dilution to holders of our common stock upon conversion of the notes and/or offset the potential cash payments that we could be required to make in excess of the principal amount of any converted notes upon conversion thereof, with such reduction and/or offset subject to a cap based on the cap price. In addition, we used approximately $20.0 million of the net proceeds from the offering to repurchase 983,284 shares of our common stock.
v3.8.0.1
Background and Basis of Presentation (Policies)
3 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation
Basis of Presentation

The accompanying condensed consolidated balance sheet as of March 31, 2018, the condensed consolidated statements of operations, the condensed consolidated statements of comprehensive loss and the condensed consolidated statements of cash flows for the three months ended March 31, 2018 and 2017 and the related footnote disclosures are unaudited. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, including normal recurring adjustments, necessary to present fairly our financial position as of March 31, 2018 and our results of operations and cash flows for the three months ended March 31, 2018 and 2017. Our results of operations and cash flows for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the full year.

We operate in a single segment. Our fiscal year ends on December 31 and in this report we refer to the year ended December 31, 2017 as 2017.

The condensed consolidated financial statements and related financial information should be read in conjunction with the audited consolidated financial statements and the related notes thereto that are included in our Annual Report on Form 10-K for the year ended December 31, 2017 (the Annual Report on Form 10-K) filed with the U.S. Securities and Exchange Commission (SEC).

We have changed the caption on our condensed consolidated statements of operations from “technology and development” to “research and development.” This change does not impact any current or previously reported amounts.

Except for our policies on revenue recognition and deferred revenue, there have been no material changes to our significant accounting policies as compared to the significant accounting policies described in our Annual Report on Form 10-K.

Revenue Recognition and Deferred Revenue
Revenue Recognition and Deferred Revenue

We recognize revenues from our Chegg Services and Required Materials offerings when control of the goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services.

We determine revenue recognition through the following steps:

Identification of the contract, or contracts, with a customer
Identification of the performance obligations in the contract
Determination of the transaction price
Allocation of the transaction price to the performance obligations in the contract
Recognition of revenue when, or as, we satisfy a performance obligation

We generate revenues from our Chegg Services product line including our Chegg Study service, our Chegg Writing service, our Chegg Tutors service, Test Prep, through our partnership with Kaplan Test Prep (Kaplan), Internship services, Brand Partnership services that we offer to brands and Enrollment Marketing services to colleges, through our strategic partnership with the National Record Center for College and University Admissions (NRCCUA). Chegg Services are offered to students through weekly, monthly or annual subscriptions, and we recognize revenues ratably over the respective subscription period. Enrollment Marketing services and Brand Partnership services are offered either on a subscription or on an a la carte basis. Revenues are recognized ratably or as earned over the subscription service period, generally one year. Revenues from Enrollment Marketing services or Brand Partnership services delivered on an a la carte basis, without a subscription, are recognized when delivery of the respective lead or service has occurred. Historically, under previous revenue recognition guidance, revenue recognition was delayed for certain contracts with extended payment terms. For these services, we bill the customer at the inception, over the term of the customer arrangement or as the services are performed. Upon satisfactory assessment of creditworthiness, we generally grant credit to our Enrollment Marketing and Brand Partnership customers with normal credit terms, typically 30 days.

Some of our customer arrangements for Brand Partnership and Enrollment Marketing services include multiple performance obligations. We have determined these performance obligations qualify as distinct performance obligations, as the customer can benefit from the service on its own or together with other resources that are readily available to the customer and our promise to transfer the service is separately identifiable from other promises in the contract. For these arrangements that contain distinct performance obligations, we allocate the transaction price based on the relative standalone selling price method by comparing the standalone selling price (SSP) of each distinct performance obligation to the total value of the contract.

We determine the SSP based on our historical pricing and discounting practices for the distinct performance obligation when sold separately. If the SSP is not directly observable, we estimate the SSP by considering information such as market conditions, and information about the customer. Additionally, we limit the amount of revenues recognized for delivered promises to the amount that is not contingent on future delivery of services or other future performance obligations.

We also generate revenues from our Required Materials product line including revenue share earned on print textbooks for rental or sale transactions, owned by Ingram and other partners, which are recognized immediately when a book ships to the student. Revenues from the rental or sale of eTextbooks is recognized ratably over the contractual period, generally two to five months, or at time of the sale, respectively. Our strategic partnership with Ingram includes an amount of variable consideration in addition to a fixed revenue share that we earn. This variable consideration can either increase or decrease the total transaction price depending on the nature of the variable consideration. Under the new revenue recognition guidance, we estimate the amount of variable consideration that we will earn at the inception of the contract, adjusted during each period, and include an estimated amount each period as opposed to the contractual amount earned under the previous revenue recognition guidance.

For sales of third party products, we evaluate whether we are acting as a principal or an agent, and therefore would record the gross sales amount as revenues and related costs or the net amount earned as a revenue share from the sale of third party products. Our determination is based on our evaluation of whether we control the specified goods or services prior to transferring them to the customer. For our strategic partnership with Ingram and our agreements with other textbook publishers, we have concluded that we do not control the use of the print textbooks, and therefore record net revenue only for the revenue share we earn upon the shipment of a print textbook to a student. For the sale of eTextbooks we have concluded that we control the service, therefore we recognize revenue and cost of revenue on a gross basis.

Revenues are presented net of sales tax collected from customers to be remitted to governmental authorities and net of allowances for estimated cancellations and customer returns, which are based on historical data. Customer refunds from cancellations and returns are recorded as a reduction to revenues.

Contract assets are contained within other current assets on our condensed consolidated balance sheets. Contract assets represent the goods or services that we have transferred to a customer before invoicing the customer. Contract receivables are contained within accounts receivable, net on our condensed consolidated balance sheets and represent unconditional consideration that will be received solely due to the passage of time. Contract liabilities are contained within deferred revenue on our condensed consolidated balance sheets. Deferred revenue primarily consists of advanced payments from students related to rentals and subscriptions performance obligations that have not been satisfied, and Brand Partnership and Enrollment Marketing performance obligations that have yet to be satisfied. Deferred revenue is recognized as revenues ratably over the term for subscriptions or when the services are provided and all other revenue recognition criteria have been met.

Use of Estimates
Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles in the United States (U.S. GAAP) requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities; the disclosure of contingent liabilities at the date of the financial statements; and the reported amounts of revenues and expenses during the reporting periods. Significant estimates, assumptions, and judgments are used for, but not limited to: revenue recognition including variable consideration, recoverability of accounts receivable, restructuring charges, share-based compensation expense including estimated forfeitures, accounting for income taxes, useful lives assigned to long-lived assets for depreciation and amortization, valuation of goodwill and long-lived assets, and the valuation of acquired intangible assets. We base our estimates on historical experience, knowledge of current business conditions, and various other factors we believe to be reasonable under the circumstances. These estimates are based on management’s knowledge about current events and expectations about actions we may undertake in the future. Actual results could differ from these estimates, and such differences could be material to our financial position and results of operations.

Recent A
Recent Accounting Pronouncements
Recent Accounting Pronouncements

Recently Issued Accounting Pronouncements not yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). ASU 2016-02 requires an entity to recognize a right-of-use asset and lease liability for all leases with terms of more than 12 months. Recognition, measurement, and presentation of expenses will depend on classification as a finance or operating lease. The amendments in this update also require certain quantitative and qualitative disclosures about leasing arrangements. Early adoption is permitted, and the guidance requires a modified retrospective adoption. The guidance is effective for annual periods beginning after December 15, 2018 and we plan to adopt the guidance on January 1, 2019. We plan to elect the package of transition practical expedients which include not reassessing whether any expired or existing contracts are or contain leases, not reassessing the lease classification of expired or existing leases, and not reassessing initial direct costs for existing leases. We will continue to evaluate ASU 2016-02 as we near our adoption date.

Recently Adopted Accounting Pronouncements

In February 2018, the FASB issued ASU No. 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. ASU 2018-02 allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. We adopted the guidance on January 1, 2018 recording an immaterial reclassification from accumulated other comprehensive income (loss) to the opening balance of accumulated deficit.

In January 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. ASU 2017-04 eliminates step 2 from the annual goodwill impairment test no longer requiring the comparison of the implied fair value of a reporting unit's goodwill with the carrying amount of goodwill. We early adopted the guidance with a prospective application on January 1, 2018 and will apply the guidance starting with our 2018 annual goodwill impairment assessment.

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. ASU 2017-01 clarifies the definition of a business to assist entities with evaluating whether a transaction should be accounted for as acquisitions of assets or businesses. We adopted the guidance with a prospective application on January 1, 2018. We will analyze the clarified definition of a business to determine whether transactions from our application date should be accounted for as an asset acquisition or business combination under the new guidance.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. ASU 2016-18 requires an entity to explain the change during a period in restricted cash equivalents on the condensed consolidated statements of cash flows and include such amounts when reconciling beginning-of-period and end-of-period total amounts shown on the consolidated statements of cash flows. We adopted the guidance with a retrospective application on January 1, 2018 and have adjusted our beginning-of-period and end-of-period amounts on our condensed consolidated statement of cash flows to include restricted cash with the change in restricted cash included within the other assets line on our condensed consolidated statement of cash flows.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 requires entities to measure equity investments at fair value and recognize any changes in fair value within the statement of operations. We have a strategic investment of $3.0 million recorded in other assets on our condensed consolidated balance sheets that falls under this guidance update. The guidance provides for electing a measurement alternative for equity investments that do not have readily determinable fair values. We have elected the measurement alternative for our strategic investment as there is not a readily determinable fair value, which we will apply to our strategic investment starting with our adoption date of January 1, 2018. This investment will be measured at cost, less any impairment, plus or minus adjustments resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer, with any changes in the value of the investment recorded within the statement of operations.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, as amended (Topic 606) (ASC 606), which changes the way we recognize revenue and significantly expands the disclosure requirements for revenue arrangements.

We adopted ASU 2014-09 under the modified retrospective application, recording the cumulative effect of adoption as an adjustment to the opening balance of accumulated deficit on our adoption date of January 1, 2018. We have not adjusted previously reported amounts. Adoption of the new standard resulted in changes to our accounting policies for revenue recognition, and trade and other receivables. See note 2 for more information.

Net Loss Per Share
et Loss Per Share

Basic net loss per share is computed by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including stock options, warrants, restricted stock units (RSUs), and performance-based restricted stock units (PSUs), to the extent dilutive. Basic and diluted net loss per share was the same for each period presented as the inclusion of all potential common shares outstanding would have been anti-dilutive.

The
v3.8.0.1
Net Loss Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share amounts):
 
Three Months Ended March 31,
 
2018
 
2017
Numerator:
 
 
 
Net loss
$
(2,617
)
 
$
(6,401
)
Denominator:
 
 
 
Weighted average shares used to compute net loss per share, basic and diluted
110,904

 
92,830

 
 
 
 
Net loss per share, basic and diluted
$
(0.02
)
 
$
(0.07
)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The following potential weighted-average shares of common stock outstanding were excluded from the computation of diluted net loss per share because including them would have been anti-dilutive (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Options to purchase common stock
4,079

 
7,975

RSUs and PSUs
8,791

 
1,888

Warrants to purchase common stock

 
200

Total common stock equivalents
12,870

 
10,063

v3.8.0.1
Revenues (Tables)
3 Months Ended
Mar. 31, 2018
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table sets forth our total net revenues for the periods shown disaggregated for our Chegg Services and Required Materials product lines (in thousands, except percentages):
 
Three Months Ended 
 March 31,
 
Change
 
2018
 
2017(1)
 
$
 
%
Chegg Services
$
56,277

 
$
41,035

 
$
15,242

 
37
 %
Required Materials
20,672

 
21,567

 
(895
)
 
(4
)%
Total net revenues
$
76,949

 
$
62,602

 
$
14,347

 
23
 %

(1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.
Schedule of Accounts Receivable
The following table presents our accounts receivable, net and deferred revenue balances (in thousands, except percentages):
 
 
 
Change
 
March 31, 2018
 
December 31, 2017
 
$
 
%
Accounts receivable, net
$
8,055

 
$
10,855

 
$
(2,800
)
 
(26
)%
Deferred revenue
$
18,625

 
$
13,440

 
$
5,185

 
39
 %
v3.8.0.1
Cash and Cash Equivalents, and Investment (Tables)
3 Months Ended
Mar. 31, 2018
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Investments
and fair value as of March 31, 2018 and December 31, 2017 (in thousands):
 
March 31, 2018
 
December 31, 2017
 
Cost
 
Net Unrealized Loss
 
Fair Value
 
Cost
 
Net Unrealized Loss
 
Fair Value
Cash and cash equivalents:
 
 
 
 
 
 
 
 
 
 
 
Cash
$
69,117

 
$

 
$
69,117

 
$
98,370

 
$

 
$
98,370

Money market funds
5,192

 

 
$
5,192

 
5,358

 

 
5,358

Commercial paper
32,516

 
2

 
32,518

 
22,729

 

 
22,729

Total cash and cash equivalents
$
106,825

 
$
2

 
$
106,827

 
$
126,457

 
$

 
$
126,457

Short-term investments:
 
 
 
 
 
 
 
 
 
 
 
Commercial paper
$
31,340

 
$
(17
)
 
$
31,323

 
$
38,850

 
$
(27
)
 
$
38,823

Corporate securities
31,103

 
(142
)
 
30,961

 
23,001

 
(43
)
 
22,958

U.S. treasury securities
19,992

 
(12
)
 
19,980

 
19,978

 
(17
)
 
19,961

Total short-term investments
$
82,435

 
$
(171
)
 
$
82,264

 
$
81,829

 
$
(87
)
 
$
81,742

 
 
 
 
 
 
 
 
 
 
 
 
Long-term corporate securities
$
10,735

 
$
(107
)
 
$
10,628

 
$
20,405

 
$
(100
)
 
$
20,305


 
The cost and fair value of available-for-sale investments as of March 31, 2018 by contractual maturity were a
Schedule of Available-for-sale Securities Reconciliation
The cost and fair value of available-for-sale investments as of March 31, 2018 by contractual maturity were as follows (in thousands):
 
Cost
 
Fair Value
Due in 1 year or less
$
114,951

 
$
114,782

Due in 1-2 years
10,735

 
10,628

Investments not due at a single maturity date
5,192

 
5,192

Total
$
130,878

 
$
130,602

v3.8.0.1
Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Financial instruments measured and recorded at fair value on a recurring basis as of March 31, 2018 and December 31, 2017 are classified based on the valuation technique level in the tables below (in thousands):
 
March 31, 2018
 
Total
 
Quoted Prices
in Active
Markets for Identical
Assets
(Level 1)
 
Significant
Other Observable
Inputs (Level 2)
Assets:
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
Money market funds
$
5,192

 
$
5,192

 
$

Commercial paper
32,518

 

 
32,518

Short-term investments:
 
 
 
 
 
Commercial paper
31,323

 

 
31,323

Corporate securities
30,961

 

 
30,961

U.S. treasury securities
19,980

 
19,980

 

Long-term corporate securities
10,628

 

 
10,628

Total assets measured and recorded at fair value
$
130,602

 
$
25,172

 
$
105,430


 
December 31, 2017
 
Total
 
Quoted Prices
in Active
Markets for Identical
Assets
(Level 1)
 
Significant 
Other Observable 
Inputs (Level 2)
Assets:
 
 
 
 
 
Cash equivalents:
 
 
 
 
 
Money market funds
$
5,358

 
$
5,358

 
$

Commercial paper
22,729

 

 
22,729

Short-term investments:

 
 
 
 
Commercial paper
38,823

 

 
38,823

Corporate securities
22,958

 

 
22,958

U.S. treasury securities
19,961

 
19,961

 

Long-term corporate securities
20,305

 

 
20,305

Total assets measured and recorded at fair value
$
130,134

 
$
25,319

 
$
104,815


v3.8.0.1
Goodwill and Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill consists of the following (in thousands):
 
Three Months Ended 
 March 31, 2018
 
Year Ended December 31, 2017
Beginning balance
$
125,272

 
$
116,239

Additions due to acquisition

 
9,024

Foreign currency translation adjustment
253

 
9

Ending balance
$
125,525

 
$
125,272

Finite-Lived Intangible Assets
Intangible assets as of March 31, 2018 and December 31, 2017 consist of the following (in thousands, except the weighted-average amortization period in months):
 
March 31, 2018
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,852
)
 
$
9,805

Customer lists
47

 
9,970

 
(5,822
)
 
4,148

Trade names
46

 
5,793

 
(3,860
)
 
1,933

Non-compete agreements
30

 
1,798

 
(1,554
)
 
244

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
172

 

 
172

Total intangible assets
57

 
$
43,020

 
$
(23,118
)
 
$
19,902

 
 
December 31, 2017
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,220
)
 
$
10,437

Customer lists
47

 
9,970

 
(5,480
)
 
4,490

Trade names
46

 
5,793

 
(3,465
)
 
2,328

Non-compete agreements
30

 
1,798

 
(1,506
)
 
292

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
6

 

 
6

Total intangible assets
57

 
$
42,854

 
$
(21,701
)
 
$
21,153



Indefinite-lived Intangible Assets
Intangible assets as of March 31, 2018 and December 31, 2017 consist of the following (in thousands, except the weighted-average amortization period in months):
 
March 31, 2018
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,852
)
 
$
9,805

Customer lists
47

 
9,970

 
(5,822
)
 
4,148

Trade names
46

 
5,793

 
(3,860
)
 
1,933

Non-compete agreements
30

 
1,798

 
(1,554
)
 
244

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
172

 

 
172

Total intangible assets
57

 
$
43,020

 
$
(23,118
)
 
$
19,902

 
 
December 31, 2017
 
Weighted-Average Amortization
Period
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Developed technologies
70

 
$
20,657

 
$
(10,220
)
 
$
10,437

Customer lists
47

 
9,970

 
(5,480
)
 
4,490

Trade names
46

 
5,793

 
(3,465
)
 
2,328

Non-compete agreements
30

 
1,798

 
(1,506
)
 
292

Master service agreements
21

 
1,030

 
(1,030
)
 

Indefinite-lived trade name

 
3,600

 

 
3,600

Foreign currency translation adjustment

 
6

 

 
6

Total intangible assets
57

 
$
42,854

 
$
(21,701
)
 
$
21,153

Estimated Future Amortization Expense Related to Intangible Assets
As of March 31, 2018, the estimated future amortization expense related to our finite-lived intangible assets is as follows (in thousands):
Remaining nine months of 2018
$
3,893

2019
4,347

2020
2,874

2021
1,518

2022
1,075

Thereafter
2,595

Total
$
16,302

v3.8.0.1
Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation Expense for Employees and Non-Employees
Total share-based compensation expense recorded for employees and non-employees, is as follows (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Cost of revenues
$
94

 
$
67

Research and development
4,133

 
3,241

Sales and marketing
1,589

 
1,126

General and administrative
5,826

 
3,844

Total share-based compensation expense
$
11,642

 
$
8,278

Summary of Restricted Stock Unit Activity
Activity for RSUs and PSUs is as follows:
 
 
RSUs and PSUs Outstanding
 
Number of RSUs and PSUs
Outstanding
 
Weighted 
Average Grant Date 
Fair Value
Balance at December 31, 2017
14,335,115

 
$
6.78

Granted
2,600,433

 
19.55

Released
(4,203,190
)
 
6.19

Canceled
(683,587
)
 
5.34

Balance at March 31, 2018
12,048,771

 
$
9.83



As of March 31, 2018, our total unrecognized share-based compensation expense r
v3.8.0.1
Restructuring Charges (Tables)
3 Months Ended
Mar. 31, 2018
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Reserve by Type of Cost
The following table summarizes the activity related to the accrual for restructuring charges (credits) (in thousands):
 
2017 Restructuring Plan
 
2015 Restructuring Plan
 
 
 
Workforce Reduction Costs
 
Lease Termination and Other Costs
 
Workforce Reduction Costs
 
Lease Termination and Other Costs
 
Total
Balance at January 1, 2017
$

 
$

 
$

 
$
306

 
$
306

Restructuring charges (credits)
941

 
148

 

 
(42
)
 
1,047

Cash payments
(897
)
 
(128
)
 

 
(43
)
 
(1,068
)
Write-offs

 
(20
)
 

 

 
(20
)
Balance at December 31, 2017
44

 

 

 
221

 
265

Restructuring charges
31

 
9

 

 
180

 
220

Cash payments

 
(9
)
 

 
(57
)
 
(66
)
Write-offs

 

 

 
(18
)
 
(18
)
Balance at March 31, 2018
$
75

 
$

 
$

 
$
326

 
$
401

v3.8.0.1
Background and Basis of Presentation (Details)
$ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
Cost-method Investments | Other Assets  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Investments $ 3.0
Chegg Services  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Revenue recognition, subscription service period 1 year
Minimum | Required Materials  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Revenue recognition, textbook rental or sale, contractual period 2 months
Maximum | Required Materials  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Revenue recognition, textbook rental or sale, contractual period 5 months
v3.8.0.1
Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Numerator:    
Net loss $ (2,617) $ (6,401) [1]
Denominator:    
Weighted average shares used to compute net loss per share, basic and diluted (in shares) 110,904 92,830
Net loss per share, basic and diluted (in dollars per share) $ (0.02) $ (0.07)
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.
v3.8.0.1
Net Loss Per Share - Shares Excluded From Computation Of Diluted Net Loss Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total common stock equivalents (in shares) 12,870 10,063
Options to purchase common stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total common stock equivalents (in shares) 4,079 7,975
RSUs and PSUs    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total common stock equivalents (in shares) 8,791 1,888
Warrants to purchase common stock | Common Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total common stock equivalents (in shares) 0 200
v3.8.0.1
Revenues (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Disaggregation of Revenue [Line Items]      
Total net revenues $ 76,949,000 $ 62,602,000  
Change in total net revenues $ 14,347,000    
Change in total net revenues, percent 23.00%    
Deferred revenue, revenue recognized $ 9,600,000    
Contract with customer, liability, revenue recognized 0    
Aggregate amount of unsatisfied performance obligations 27,100,000    
Accounts receivable 8,055,000   $ 10,855,000
Deferred revenue 18,625,000   $ 13,440,000
Change in accounts receivable (2,783,000) (1,947,000) [1]  
Change in deferred revenue $ 5,200,000    
Change in accounts receivable, percent (26.00%)    
Change in deferred revenue, percent 39.00%    
Chegg Services      
Disaggregation of Revenue [Line Items]      
Total net revenues $ 56,277,000 41,035,000  
Change in total net revenues $ 15,242,000    
Change in total net revenues, percent 37.00%    
Required Materials      
Disaggregation of Revenue [Line Items]      
Total net revenues $ 20,672,000 $ 21,567,000  
Change in total net revenues $ (895,000)    
Change in total net revenues, percent (4.00%)    
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.
v3.8.0.1
Cash and Cash Equivalents, and Investment - Additional Information (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Schedule of Cost-method Investments [Line Items]    
Restricted cash $ 0.5 $ 0.5
Other Assets | Equity Investments    
Schedule of Cost-method Investments [Line Items]    
Investments $ 3.0  
v3.8.0.1
Cash and Cash Equivalents, and Investment - Schedule of Available For Sale Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Cash and cash equivalents:    
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 106,825 $ 126,457
Net Unrealized Loss 2 0
Fair Value 106,827 126,457
Short-term investments:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 82,435 81,829
Net Unrealized Loss (171) (87)
Fair Value 82,264 81,742
Long-term corporate securities    
Schedule of Available-for-sale Securities [Line Items]    
Cost 10,735 20,405
Net Unrealized Loss (107) (100)
Fair Value 10,628 20,305
Corporate securities | Short-term investments:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 31,103 23,001
Net Unrealized Loss (142) (43)
Fair Value 30,961 22,958
Commercial paper | Short-term investments:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 31,340 38,850
Net Unrealized Loss (17) (27)
Fair Value 31,323 38,823
U.S. treasury securities | Short-term investments:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 19,992 19,978
Net Unrealized Loss (12) (17)
Fair Value 19,980 19,961
Cash | Cash and cash equivalents:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 69,117 98,370
Net Unrealized Loss 0 0
Fair Value 69,117 98,370
Money market funds | Cash and cash equivalents:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 5,192 5,358
Net Unrealized Loss 0 0
Fair Value 5,192 5,358
Commercial paper | Cash and cash equivalents:    
Schedule of Available-for-sale Securities [Line Items]    
Cost 32,516 22,729
Net Unrealized Loss 2 0
Fair Value $ 32,518 $ 22,729
v3.8.0.1
Cash and Cash Equivalents, and Investment - Contractual Maturity (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Cash and Cash Equivalents [Abstract]  
Due in 1 year or less, Cost $ 114,951
Due in 1-2 years, Cost 10,735
Investments not due at a single maturity date, Cost 5,192
Total, Cost 130,878
Due in 1 year or less, Fair Value 114,782
Due in 1-2 years, Fair Value 10,628
Investments not due at a single maturity date, Fair Value 5,192
Total, Fair Value $ 130,602
Weighted average maturity 4 months
v3.8.0.1
Fair Value Measurement (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments $ 82,264 $ 81,742
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured and recorded at fair value 130,602 130,134
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured and recorded at fair value 25,172 25,319
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured and recorded at fair value 105,430 104,815
Commercial paper | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 31,323 38,823
Commercial paper | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 0 0
Commercial paper | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 31,323 38,823
Corporate securities | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 30,961 22,958
Long-term corporate securities 10,628 20,305
Corporate securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 0 0
Long-term corporate securities 0 0
Corporate securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 30,961 22,958
Long-term corporate securities 10,628 20,305
U.S. treasury securities | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 19,980 19,961
U.S. treasury securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 19,980 19,961
U.S. treasury securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 0 0
Money market funds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 5,192 5,358
Money market funds | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 5,192 5,358
Money market funds | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 0 0
Commercial paper | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 32,518 22,729
Commercial paper | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 0 0
Commercial paper | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 32,518 $ 22,729
v3.8.0.1
Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Goodwill [Roll Forward]    
Beginning balance $ 125,272 $ 116,239
Additions due to acquisition 0 9,024
Foreign currency translation adjustment 253 9
Ending balance $ 125,525 $ 125,272
v3.8.0.1
Goodwill and Intangible Assets - Finite-lived and Indefinite-lived Intangibe Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 57 months 57 months
Accumulated Amortization $ (23,118) $ (21,701)
Net Carrying Amount 16,302  
Indefinite-lived trade name 3,600 3,600
Foreign currency translation adjustment 172 6
Total intangible assets, gross carrying amount 43,020 42,854
Intangible assets, net $ 19,902 $ 21,153
Developed technologies    
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 70 months 70 months
Gross Carrying Amount $ 20,657 $ 20,657
Accumulated Amortization (10,852) (10,220)
Net Carrying Amount $ 9,805 $ 10,437
Customer lists    
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 47 months 47 months
Gross Carrying Amount $ 9,970 $ 9,970
Accumulated Amortization (5,822) (5,480)
Net Carrying Amount $ 4,148 $ 4,490
Trade names    
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 46 months 46 months
Gross Carrying Amount $ 5,793 $ 5,793
Accumulated Amortization (3,860) (3,465)
Net Carrying Amount $ 1,933 $ 2,328
Non-compete agreements    
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 30 months 30 months
Gross Carrying Amount $ 1,798 $ 1,798
Accumulated Amortization (1,554) (1,506)
Net Carrying Amount $ 244 $ 292
Master service agreements    
Finite Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 21 months 21 months
Gross Carrying Amount $ 1,030 $ 1,030
Accumulated Amortization (1,030) (1,030)
Net Carrying Amount $ 0 $ 0
v3.8.0.1
Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Acquisition-Related Intangible Assets    
Finite Lived Intangible Assets [Line Items]    
Amortization expense of acquisition related to acquired intangible assets $ 1.4 $ 1.4
v3.8.0.1
Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Details)
$ in Thousands
Mar. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remaining nine months of 2018 $ 3,893
2019 4,347
2020 2,874
2021 1,518
2022 1,075
Thereafter 2,595
Net Carrying Amount $ 16,302
v3.8.0.1
Debt Obligations (Details) - Revolving Credit Facility - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Sep. 30, 2019
Sep. 30, 2016
Debt Instrument [Line Items]            
Face amount           $ 30,000,000.0
Maximum borrowing capacity $ 30,000,000         $ 50,000,000.0
EBITDA calculation expense threshold, acquisition expenses permissible 6,000,000.0          
EBITDA calculation expense threshold, nonrecurring expenses 2,000,000.0          
Cash and cash equivalents minimum balance 30,000,000.0 $ 25,000,000.0        
EBITDA target       $ 25,000,000.0    
Amount outstanding $ 0          
LIBOR Rate            
Debt Instrument [Line Items]            
Unused capacity, commitment fee percentage 0.25%          
Total Leverage Ratio Less Than 1%            
Debt Instrument [Line Items]            
Unused capacity, commitment fee percentage 1.50%          
Total Leverage Ratio Greater Or Equal 1%            
Debt Instrument [Line Items]            
Unused capacity, commitment fee percentage 2.50%          
Scenario, Forecast            
Debt Instrument [Line Items]            
EBITDA target     $ 30,000,000.0   $ 35,000,000.0  
v3.8.0.1
Commitments and Contingencies (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]    
Rental expense $ 0.6 $ 0.7
v3.8.0.1
Stockholders' Equity - Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Share-based compensation expense $ 11,642 $ 8,278
Cost of revenues    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Share-based compensation expense 94 67
Research and development    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Share-based compensation expense 4,133 3,241
Sales and marketing    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Share-based compensation expense 1,589 1,126
General and administrative    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Share-based compensation expense $ 5,826 $ 3,844
v3.8.0.1
Stockholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Capitalized share-based compensation $ 0 $ 0
RSUs and PSUs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation costs related to restricted stock units $ 81,300,000  
Weighted average vesting period for recognition of compensation expense 1 year 11 months 1 day  
v3.8.0.1
Stockholders' Equity - Summary of Restricted Stock Unit Activity (Details) - RSUs and PSUs
3 Months Ended
Mar. 31, 2018
$ / shares
shares
Number of RSUs and PSUs Outstanding  
Number of RSUs and PSUs Outstanding, Beginning (shares) | shares 14,335,115
Number of RSUs and PSUs, Granted (shares) | shares 2,600,433
Number of RSUs and PSUs, Released (shares) | shares (4,203,190)
Number of RSUs and PSUs, Canceled (shares) | shares (683,587)
Number of RSUs and PSUs Outstanding, Ending (shares) | shares 12,048,771
Weighted Average Grant Date Fair Value  
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares $ 6.78
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares 19.55
Weighted Average Grant Date Fair Value, Released (in dollars per share) | $ / shares 6.19
Weighted Average Grant Date Fair Value, Canceled (in dollars per share) | $ / shares 5.34
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares $ 9.83
v3.8.0.1
Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Tax Disclosure [Abstract]    
Provision for income taxes $ 541 $ 647
v3.8.0.1
Restructuring Charges - Narrative (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
position
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 220 $ 900 $ 1,047  
Restructuring reserve 401   265 $ 306
Restructuring reserve, current 300      
Restructuring reserve, noncurrent $ 100      
2017 Restructuring Plan | Workforce Reduction Costs        
Restructuring Cost and Reserve [Line Items]        
Number of positions eliminated | position 50      
Restructuring charges $ 31   941  
Restructuring reserve 75   44 0
2017 Restructuring Plan | Lease Termination and Other Costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 9   148  
Restructuring reserve 0   0 0
2015 Restructuring Plan | Workforce Reduction Costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 0   0  
Restructuring reserve 0   0 0
2015 Restructuring Plan | Lease Termination and Other Costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 180   (42)  
Restructuring reserve $ 326   $ 221 $ 306
v3.8.0.1
Restructuring Charges - Restructuring Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Restructuring Reserve [Roll Forward]      
Beginning balance $ 265 $ 306 $ 306
Restructuring charges 220 900 1,047
Cash payments (66)   (1,068)
Write-offs (18)   (20)
Ending balance 401   265
2017 Restructuring Plan | Workforce Reduction Costs      
Restructuring Reserve [Roll Forward]      
Beginning balance 44 0 0
Restructuring charges 31   941
Cash payments 0   (897)
Write-offs 0   0
Ending balance 75   44
2017 Restructuring Plan | Lease Termination and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning balance 0 0 0
Restructuring charges 9   148
Cash payments (9)   (128)
Write-offs 0   (20)
Ending balance 0   0
2015 Restructuring Plan | Workforce Reduction Costs      
Restructuring Reserve [Roll Forward]      
Beginning balance 0 0 0
Restructuring charges 0   0
Cash payments 0   0
Write-offs 0   0
Ending balance 0   0
2015 Restructuring Plan | Lease Termination and Other Costs      
Restructuring Reserve [Roll Forward]      
Beginning balance 221 $ 306 306
Restructuring charges 180   (42)
Cash payments (57)   (43)
Write-offs (18)   0
Ending balance $ 326   $ 221
v3.8.0.1
Related-Party Transactions (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
board_member
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Adobe Systems | Chief Executive Officer      
Related Party Transaction [Line Items]      
Purchases from related party $ 1,700,000 $ 500,000  
Due to related parties 600,000   $ 300,000
Revenue from related parties 100,000 0  
Receivables from related party 0   0
Cengage | Chief Executive Officer      
Related Party Transaction [Line Items]      
Due to related parties 600,000   100,000
Revenue from related parties 1,900,000 400,000  
Receivables from related party     $ 300,000
Cengage | Board Of Directors Member      
Related Party Transaction [Line Items]      
Purchases from related party $ 5,100,000 3,500,000  
Number of board members appointed to Board of Directors of related party | board_member 1    
PayPal | Board Of Directors Member      
Related Party Transaction [Line Items]      
Number of board members appointed to Board of Directors of related party | board_member 1    
Expenses from transactions with related party $ 400,000 $ 300,000  
v3.8.0.1
Subsequent Event (Details) - 0.25 Percent Convertible Senior Notes Due 2023 - Senior Notes
$ / shares in Units, $ in Millions
Apr. 03, 2018
USD ($)
$ / shares
shares
Mar. 28, 2018
$ / shares
Subsequent Event [Line Items]    
Share price (in dollars per share) | $ / shares   $ 20.34
Subsequent Event    
Subsequent Event [Line Items]    
Face amount $ 345.0  
Face amount, option to purchase additional notes $ 45.0  
Interest rate, stated percentage 0.25%  
Proceeds from debt, net $ 335.6  
Conversion ratio 0.037051  
Conversion price (in dollars per share) | $ / shares $ 26.95  
Conversion price, premium percent 32.50%  
Payments for capital call transactions $ 39.2  
Payments for repurchase of common stock $ 20.0  
Shares repurchased (in shares) | shares 983,284  
v3.8.0.1
Label Element Value
Restricted Cash and Cash Equivalents, Current us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue $ 0 [1]
Restricted Cash and Cash Equivalents, Current us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue 84,000
Restricted Cash and Cash Equivalents, Noncurrent us-gaap_RestrictedCashAndCashEquivalentsNoncurrent 463,000 [1]
Restricted Cash and Cash Equivalents, Noncurrent us-gaap_RestrictedCashAndCashEquivalentsNoncurrent $ 423,000
[1] Adjusted to reflect the adoption of ASU 2016-18. See Note 1 for more information.