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Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | The following summarizes the stock option activity for the periods presented:
| Number of options outstanding |  | Weighted- average exercise price (per share) |  | Weighted- average remaining contract life (in years) |  | Aggregate intrinsic value (in thousands)
Outstanding as of December 31, 2020 | 255,000 |  |  | $ | 10.82 |  |  | 4.42 |  | $ | 36,426 |
Granted | — |  |  | — |  |  |  |  |
Exercised | (57,817) |  |  | 13.02 |  |  |  |  | 7,697 |
Forfeited or cancelled | (750) |  |  | 9.57 |  |  |  |  |
Outstanding as of March 31, 2021 | 196,433 |  |  | $ | 10.18 |  |  | 4.18 |  | $ | 22,897 |
Options vested and exercisable at March 31, 2021 | 170,100 |  |  | $ | 8.95 |  |  | 3.83 |  | $ | 20,035 |
Options vested and expected to vest as of March 31, 2021 | 195,810 |  |  | $ | 10.16 |  |  | 4.18 |  | $ | 22,828 |
Summary of Restricted Stock Unit Activity | The following summarizes the RSU activity for the periods presented:
| Number of awards outstanding |  | Weighted-average grant date fair value (per share)
Nonvested RSUs as of December 31, 2020 | 450,614 |  |  | $ | 51.58 |
Granted | 113,664 |  |  | 153.90 |
Vested | (141,707) |  |  | 48.45 |
Forfeited or cancelled | (16,696) |  |  | 63.36 |
Nonvested RSUs as of March 31, 2021 | 405,875 |  |  | $ | 82.33 |
Schedule of Stock-Based Compensation Expense | The Company recognized total stock-based compensation expense as follows:
|  |  |  |  | Three months ended March 31,
|  |  |  |  |  |  | 2020 |  | 2021
Cost of revenue |  |  |  |  |  |  | $ | 175 |  |  | $ | 72 |
Research and development |  |  |  |  |  |  | 453 |  |  | 768 |
Sales and marketing |  |  |  |  |  |  | 395 |  |  | 614 |
General and administrative |  |  |  |  |  |  | 1,476 |  |  | 2,936 |
Total |  |  |  |  |  |  | $ | 2,499 |  |  | $ | 4,390 |

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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 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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + 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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