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Stock-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2022
Share-based Payment Arrangement [Abstract] |
Schedule of Stock Based Compensation Cost | We recorded stock-based compensation expense in the following categories in the accompanying unaudited condensed consolidated statements of operations and balance sheets (in thousands):
| Three Months Ended June 30, | Six Months Ended June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Cost of revenue |  | $ | 1,331 |  |  | $ | 762 |  |  | $ | 1,608 |  |  | $ | 821 |
Sales and marketing |  | 3,536 |  |  | 5,143 |  |  | 6,661 |  |  | 5,350 |
Technology and development |  | 4,148 |  |  | 17,619 |  |  | 8,446 |  |  | 18,145 |
General and administrative |  | 13,832 |  |  | 21,430 |  |  | 27,997 |  |  | 24,580 |
Total stock-based compensation expense |  | 22,847 |  |  | 44,954 |  |  | 44,712 |  |  | 48,896 |
Amount capitalized to internal-use software |  | 749 |  |  | 13 |  |  | 1,230 |  |  | 26 |
Total stock-based compensation expense |  | $ | 23,596 |  |  | $ | 44,967 |  |  | $ | 45,942 |  |  | $ | 48,922 |
Schedule of Stock Options Activity | Stock option activity for the six months ended June 30, 2022 is as follows (in thousands, except weighted-average exercise price and remaining contract life):
| Number of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Life (in Years) |  | Aggregate Intrinsic Value
Outstanding at December 31, 2021 | 15,274 |  |  | $ | 10.47 |  |  | 8.0 |  | $ | 97,094 |
Granted | 2,766 |  |  | 14.15 |  |  |  |  |
Exercised | (258) |  |  | 1.11 |  |  |  |  |
Cancelled/forfeited | (10) |  |  | 1.16 |  |  |  |  |
Outstanding at June 30, 2022 | 17,772 |  |  | $ | 11.15 |  |  | 7.9 |  | $ | 21,781 |
Vested and expected to vest at June 30, 2022 | 17,764 |  |  | $ | 11.19 |  |  | 7.9 |  | $ | 21,757 |
Exercisable at June 30, 2022 | 8,516 |  |  | $ | 9.21 |  |  | 7.3 |  | $ | 15,200 |
Schedule of Fair Value Assumptions and Techniques for Stock Options | The weighted-average assumptions that were used to calculate the grant-date fair value of our stock option grants using the Black-Scholes option pricing model were as follows:
| Three Months Ended June 30, | Six Months Ended June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Expected life (years) |  | — |  |  | 5.4 |  | 5.6 |  | 5.4
Risk-free interest rate |  | — | % |  | 1.0 | % |  | 2.6 | % |  | 1.0 | %
Expected volatility |  | — | % |  | 45.6 | % |  | 47.6 | % |  | 45.6 | %
Expected dividend yield |  | — |  |  | — | % |  | — |  |  | — | %
Summary of Restricted Stock Unit Activity | Restricted Stock Units Restricted stock unit, or RSU, activity for the six months ended June 30, 2022 is as follows (in thousands, except weighted-average grant-date fair value):
| Number of Units |  | Weighted- Average Grant- Date Fair Value
Unvested at December 31, 2021 | 3,577 |  |  | $ | 21.52 |
Granted | 5,310 |  |  | 13.96 |
Cancelled/forfeited | (432) |  |  | 14.83 |
Vested | (663) |  |  | 20.01 |
Unvested at June 30, 2022 | 7,792 |  |  | $ | 16.94 |

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- Definition Tabular disclosure of employee stock purchase plan activity. + 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 (g) -URI http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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