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Stockholders' Equity and Equity Incentive Plans (Tables) | 3 Months Ended
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Mar. 31, 2023
Equity [Abstract] |
Schedule of Reserved Shares of Common Stock | The Company has reserved shares of its common stock as follows:
|  | As of March 31, 2023 |  |  | As of December 31, 2022 |
2014 Stock Option and Grant Plan and 2021 Incentive Award Plan: |  |  |  |  |  |
Equity plan stock options outstanding |  |  | 16,169,545 |  |  |  | 16,767,752 |
RSUs outstanding |  |  | 10,635,635 |  |  |  | 9,914,125 |
Shares available for future issuance |  |  | 20,977,550 |  |  |  | 16,774,634 |
2021 Employee Stock Purchase Plan: |  |  |  |  |  |
Shares available for future issuance |  |  | 4,553,786 |  |  |  | 3,411,791 |
Total reserved shares |  |  | 52,336,516 |  |  |  | 46,868,302 |
Summary of Stock Option Activity | Option activity under the Company's combined stock plans for the three months ended March 31, 2023 is set forth below:
|  |  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  |  | Weighted |  |  | average |  |  | Aggregate |
|  | Outstanding |  |  | average |  |  | remaining |  |  | intrinsic |
|  | stock |  |  | exercise |  |  | contractual |  |  | value |
|  | options |  |  | price |  |  | life (years) |  |  | (in thousands) |
Balances as of December 31, 2022 |  |  | 16,767,752 |  |  | $ | 4.19 |  |  |  | 7.19 |  |  | $ | 132,298 |
Granted |  |  | 241,819 |  |  |  | 12.37 |  |  |  |  |  |  |
Exercised |  |  | (554,344 | ) |  |  | 3.04 |  |  |  |  |  |  |
Cancelled/forfeited |  |  | (285,682 | ) |  |  | 5.20 |  |  |  |  |  |  |
Balances as of March 31, 2023(1) |  |  | 16,169,545 |  |  | $ | 4.34 |  |  |  | 6.99 |  |  | $ | 130,973 |
Exercisable as of March 31, 2023(2) |  |  | 12,764,513 |  |  | $ | 3.39 |  |  |  | 6.68 |  |  | $ | 115,519 |
(1) As no forfeitures are estimated due to the Company's adoption of ASU No. 2016-09, all options are vested or expected to vest. As of March 31, 2023, no options were outstanding that were subject to a future performance condition (2) Exercisable shares include vested options as well as unvested shares that can be early exercised
Schedule of RSU Activity | RSU activity during the three months ended March 31, 2023 was as follows:
|  | Restricted stock units |  |  | Weighted-average grant date fair value per share |
Balance as of December 31, 2022 |  |  | 9,914,125 |  |  | $ | 19.14 |
Granted |  |  | 1,983,923 |  |  |  | 13.49 |
Vested |  |  | (875,055 | ) |  |  | 20.28 |
Cancelled/forfeited |  |  | (387,358 | ) |  |  | 20.35 |
Balance as of March 31, 2023 |  |  | 10,635,635 |  |  | $ | 17.94 |
Schedule of Stock-based Compensation Expense | Stock-based compensation expense, net of actual forfeitures is reflected in the condensed consolidated statement of operations and comprehensive loss (in thousands):
|  | Three Months Ended March 31, |  |
|  | 2023 |  |  | 2022 |  |
Cost of revenue |  | $ | 1,792 |  |  | $ | 922 |  |
Research and development |  |  | 8,579 |  |  |  | 4,284 |  |
Sales and marketing |  |  | 6,368 |  |  |  | 3,240 |  |
General and administrative |  |  | 3,218 |  |  |  | 5,057 |  |
Total stock-based compensation expense |  | $ | 19,957 |  |  | $ | 13,503 |  |

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