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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2022
Equity [Abstract] |
Summary of Stock Options Activity | The activity for stock options under the Company’s stock plans for the six months ended June 30, 2022 is as follows:
|  |  |  |  |  |  |  |  |  |  | Remaining |  |  |  |
|  |  |  |  |  |  |  |  |  |  | weighted- |  |  |  |
|  |  |  |  |  |  |  | Weighted- |  |  | average |  |  | Per share |
|  |  |  |  |  |  |  | average |  |  | contractual |  |  | average |
|  |  |  |  | Price per |  |  | exercise |  |  | terms |  |  | intrinsic |
|  | Options |  |  | share |  |  | price |  |  | (in years) |  |  | value |
Outstanding as of December 31, 2021 |  |  | 459,441 |  |  | $1.17-$83.30 |  |  | $ | 42.18 |  |  |  | 1.36 |  |  | $ | 4.31 |
Exercised |  |  | (8,649 | ) |  | 1.17-8.37 |  |  |  | 4.08 |  |  |  |  |  |  |
Forfeited |  |  | (7,500 | ) |  | 38.54-44.19 |  |  |  | 42.31 |  |  |  |  |  |  |
Expired |  |  | (54,755 | ) |  |  | 38.54 |  |  |  | 38.54 |  |  |  |  |  |  |
Outstanding as of June 30, 2022 |  |  | 388,537 |  |  | 1.17-83.30 |  |  |  | 43.54 |  |  |  | 0.88 |  |  |  | 2.84 |
Vested and exercisable as of June 30, 2022 |  |  | 388,537 |  |  | 1.17-83.30 |  |  |  | 43.54 |  |  |  | 0.88 |  |  |  | 2.84 |
Vested and expected to vest as of June 30, 2022 |  |  | 388,537 |  |  | $1.17-$83.30 |  |  | $ | 43.54 |  |  |  | 0.88 |  |  | $ | 2.84 |
Summary of Restricted Stock Activity | Stock Awards activity for the six months ended June 30, 2022 is summarized below:
|  |  |  |  |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  |  |  |  |  |  | average |
|  |  |  |  |  |  |  |  |  |  | grant |
|  |  |  |  | Performance |  |  |  |  |  | date fair |
|  |  |  |  | and |  |  |  |  |  | value |
Restricted stock units |  | Time-based |  |  | time-based |  |  | Total |  |  | per share |
Unvested restricted stock units as of December 31, 2021 |  |  | 289,166 |  |  |  | 99,112 |  |  |  | 388,278 |  |  | $ | 54.81 |
Granted |  |  | 640,667 |  |  |  | 164,722 |  |  |  | 805,389 |  |  |  | 30.18 |
Vested |  |  | (96,295 | ) |  |  | (37,677 | ) |  |  | (133,972 | ) |  |  | 55.72 |
Forfeited/canceled |  |  | (55,384 | ) |  |  | (27,716 | ) |  |  | (83,100 | ) |  |  | 47.66 |
Unvested restricted stock units as of June 30, 2022 (1) |  |  | 778,154 |  |  |  | 198,441 |  |  |  | 976,595 |  |  | $ | 34.97 |
Unvested and expected to vest restricted stock units outstanding as of June 30, 2022 |  |  |  |  |  |  |  |  | 816,827 |  |  | $ | 34.63 |
|  |  |  |  |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  |  |  |  |  |  | average |
|  |  |  |  |  |  |  |  |  |  | grant |
|  |  |  |  | Performance |  |  |  |  |  | date fair |
|  |  |  |  | and |  |  |  |  |  | value |
Restricted stock awards |  | Time-based |  |  | time-based |  |  | Total |  |  | per share |
Unvested restricted stock awards outstanding as of December 31, 2021 |  |  | 10,416 |  |  |  | 5,629 |  |  |  | 16,045 |  |  | $ | 87.12 |
Vested |  |  | (3,327 | ) |  |  | (5,629 | ) |  |  | (8,956 | ) |  |  | 99.53 |
Forfeited/canceled |  |  | (5,011 | ) |  |  | — |  |  |  | (5,011 | ) |  |  | 73.45 |
Unvested restricted stock awards outstanding as of June 30, 2022 (1) |  |  | 2,078 |  |  |  | — |  |  |  | 2,078 |  |  | $ | 84.50 |
Unvested and expected to vest restricted stock awards outstanding as of June 30, 2022 |  |  |  |  |  |  |  |  | 1,984 |  |  | $ | 85.06 |
(1) Outstanding restricted stock units and restricted stock awards are based on the maximum payout of the targeted number of shares.
Summary of Stock-based Compensation Expense | Stock-based compensation Stock-based compensation expense recognized for the three and six months ended June 30, 2022 and 2021, was as follows:
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Stock-based compensation expense by type of award: |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units and restricted stock awards |  |  | 2,891 |  |  | $ | 3,053 |  |  |  | 5,359 |  |  |  | 5,383 |
Employee stock purchase plan |  |  | 129 |  |  |  | 186 |  |  |  | 326 |  |  |  | 372 |
Total stock-based compensation expense |  | $ | 3,020 |  |  | $ | 3,239 |  |  | $ | 5,685 |  |  | $ | 5,755 |
For the three and six months ended June 30, 2022 and 2021, respectively, stock-based compensation expense recognized under ASC 718, included in cost of revenue, research and development expense, sales and marketing expense, and general and administrative expense was as follows:
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Cost of revenue |  | $ | 303 |  |  | $ | 319 |  |  | $ | 536 |  |  | $ | 557 |
Research and development |  |  | 412 |  |  |  | 382 |  |  |  | 796 |  |  |  | 680 |
Sales and marketing |  |  | 766 |  |  |  | 668 |  |  |  | 1,357 |  |  |  | 1,280 |
General and administrative |  |  | 1,539 |  |  |  | 1,870 |  |  |  | 2,996 |  |  |  | 3,238 |
Total stock-based compensation expense |  | $ | 3,020 |  |  | $ | 3,239 |  |  | $ | 5,685 |  |  | $ | 5,755 |

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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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