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Stock Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 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 | (70,923) |  |  | 12.68 |  |  |  |  | 9,059 |
Forfeited or cancelled | (806) |  |  | 10.49 |  |  |  |  |
Outstanding as of September 30, 2021 | 183,271 |  |  | $ | 10.10 |  |  | 3.59 |  | $ | 14,694 |
Options vested and exercisable at September 30, 2021 | 178,878 |  |  | $ | 9.79 |  |  | 3.53 |  | $ | 14,398 |
Options vested and expected to vest as of September 30, 2021 | 183,032 |  |  | $ | 10.09 |  |  | 3.59 |  | $ | 14,678 |
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 | 146,989 |  |  | 146.80 |
Vested | (173,695) |  |  | 62.13 |
Forfeited or cancelled | (54,294) |  |  | 74.82 |
Nonvested RSUs as of September 30, 2021 | 369,614 |  |  | $ | 84.11 |
Schedule of Stock-Based Compensation Expense | The Company recognized total stock-based compensation expense as follows:
| Three months ended September 30, |  |  |  | Nine months ended September 30,
| 2020 |  | 2021 |  |  |  | 2020 |  | 2021
Cost of revenue | $ | 46 |  |  | $ | 52 |  |  |  |  | $ | 161 |  |  | $ | 190 |
Research and development | 508 |  |  | 621 |  |  |  |  | 1,581 |  |  | 2,055 |
Sales and marketing | 369 |  |  | 519 |  |  |  |  | 1,140 |  |  | 1,591 |
General and administrative | 1,459 |  |  | 2,633 |  |  |  |  | 4,424 |  |  | 7,756 |
Total | $ | 2,382 |  |  | $ | 3,825 |  |  |  |  | $ | 7,306 |  |  | $ | 11,592 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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 (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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=122041274&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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