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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Non-cash Compensation Related to Equity Awards | Non-cash compensation related to equity awards is included in the following line items in the accompanying consolidated statements of operations and comprehensive income (in thousands):
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Cost of revenue | $ | 214 |  |  | $ | 393 |  |  |  |  |
Selling and marketing expense | 1,744 |  |  | 2,039 |  |  |  |  |
General and administrative expense | 7,343 |  |  | 9,600 |  |  |  |  |
Product development | 1,902 |  |  | 1,965 |  |  |  |  |
Restructuring and severance | 71 |  |  | 1,083 |  |  |  |  |
Total non-cash compensation | $ | 11,274 |  |  | $ | 15,080 |  |  |  |  |
Summary of Changes in Outstanding Stock Options | A summary of changes in outstanding stock options is as follows:
| Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value(a)
|  |  | (per option) |  | (in years) |  | (in thousands)
Options outstanding at January 1, 2023 | 805,079 |  |  | $ | 155.10 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Expired | (34,313) |  |  | 239.93 |  |  |  |  |
Options outstanding at March 31, 2023 | 770,766 |  |  | 151.32 |  |  | 5.14 |  | $ | 171 |
Options exercisable at March 31, 2023 | 553,965 |  |  | $ | 134.08 |  |  | 3.92 |  | $ | 171 |
(a)The aggregate intrinsic value represents the total pre-tax intrinsic value (the difference between the Company's closing stock price of $26.66 on the last trading day of the quarter ended March 31, 2023 and the exercise price, multiplied by the number of shares covered by in-the-money options) that would have been received by the option holder had the option holder exercised these options on March 31, 2023. The intrinsic value changes based on the market value of the Company's common stock.
Summary of Changes in Outstanding Stock Options with Market Conditions | A summary of changes in outstanding stock options with market conditions at target is as follows:
| Number of Options with Market Conditions |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value(a)
|  |  | (per option) |  | (in years) |  | (in thousands)
Options outstanding at January 1, 2023 | 734,685 |  |  | $ | 230.79 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Expired | (16,247) |  |  | 308.96 |  |  |  |  |
Options outstanding at March 31, 2023 | 718,438 |  |  | 229.02 |  |  | 5.43 |  | $ | — |
Options exercisable at March 31, 2023 | 481,669 |  |  | $ | 195.10 |  |  | 4.35 |  | $ | — |
(a)The aggregate intrinsic value represents the total pre-tax intrinsic value (the difference between the Company's closing stock price of $26.66 on the last trading day of the quarter ended March 31, 2023 and the exercise price, multiplied by the number of shares covered by in-the-money options) that would have been received by the option holder had the option holder exercised these options on March 31, 2023. The intrinsic value changes based on the market value of the Company's common stock.
Summary of Changes in Outstanding Nonvested RSUs with Performance Conditions and Nonvested RSAs with Market Conditions | A summary of changes in outstanding nonvested restricted stock units (“RSUs”) is as follows:
| RSUs
| Number of Units |  | Weighted Average Grant Date Fair Value
|  |  | (per unit)
Nonvested at January 1, 2023 | 485,053 |  |  | $ | 127.46 |
Granted | 349,399 |  |  | 33.00 |
Vested | (150,097) |  |  | 155.46 |
Forfeited | (11,427) |  |  | 95.25 |
Nonvested at March 31, 2023 | 672,928 |  |  | $ | 72.68 |
A summary of changes in outstanding nonvested RSUs with performance conditions is as follows:
| RSUs with Performance Conditions
| Number of Units |  | Weighted Average Grant Date Fair Value
|  |  | (per unit)
Nonvested at January 1, 2023 | 16,000 |  |  | $ | 83.25 |
Granted | — |  |  | — |
Vested | — |  |  | — |
Forfeited | (16,000) |  |  | 83.25 |
Nonvested at March 31, 2023 | — |  |  | $ | — |
Summary of Employee Stock Purchase Plan Valuation Assumptions | For purposes of determining stock-based compensation expense, the grant date fair value per share estimated using the Black-Scholes option pricing model required the use of the following key assumptions:
| Three Months Ended March 31,
| 2023 |  | 2022
Expected term (1) | 0.50 years |  | 0.50 years
Expected dividend (2) | — |  |  | — |
Expected volatility (3) | 82 | % |  | 49%
Risk-free interest rate (4) | 4.76 | % |  | 0.19%
(1)The expected term was calculated using the time period between the grant date and the purchase date. (2)No dividends are expected to be paid, resulting in a zero expected dividend rate. (3)The expected volatility rate is based on the historical volatility of the Company's common stock. (4)The risk-free interest rate is specific to the date of grant. The risk-free interest rate is based on U.S. Treasury yields for notes with comparable expected terms as the employee stock purchase rights, in effect at the grant date.

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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