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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Schedule of Stock-based Compensation Expense Amounts Included in Condensed Consolidated Statement of Operations | The following table presents the detail of stock-based compensation expense amounts included in the condensed consolidated statement of operations for each of the periods presented:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Equity awards |  | (in thousands) |
Cost of revenue |  | $ | 428 |  |  | $ | 30 |  |  | $ | 812 |  |  | $ | 86 |
Research and development |  |  | 2,531 |  |  |  | 974 |  |  |  | 4,987 |  |  |  | 1,916 |
Selling, general and administrative |  |  | 3,675 |  |  |  | 2,072 |  |  |  | 7,010 |  |  |  | 3,829 |
|  | $ | 6,634 |  |  | $ | 3,076 |  |  | $ | 12,809 |  |  | $ | 5,831 |
Liability-based awards - equity settled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenue |  | $ | 33 |  |  | $ | — |  |  | $ | 50 |  |  | $ | — |
Research and development |  |  | 328 |  |  |  | — |  |  |  | 532 |  |  |  | — |
Selling, general and administrative |  |  | 494 |  |  |  | — |  |  |  | 758 |  |  |  | — |
|  | $ | 855 |  |  | $ | — |  |  | $ | 1,340 |  |  | $ | — |
Total stock-based compensation - equity settled |  | $ | 7,489 |  |  | $ | 3,076 |  |  | $ | 14,149 |  |  | $ | 5,831 |
Liability-based awards - cash settled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenue |  | $ | — |  |  | $ | 40 |  |  | $ | 102 |  |  | $ | 40 |
Research and development |  |  | 37 |  |  |  | 98 |  |  |  | 143 |  |  |  | 98 |
Selling, general and administrative |  |  | — |  |  |  | 54 |  |  |  | 108 |  |  |  | 54 |
Total stock-based compensation - cash settled |  | $ | 37 |  |  | $ | 192 |  |  | $ | 353 |  |  | $ | 192 |
Total stock-based compensation expense |  | $ | 7,526 |  |  | $ | 3,268 |  |  | $ | 14,502 |  |  | $ | 6,023 |
RSU and CRSU |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Schedule of Restricted Stock Unit Award ("RSU") and Cash Restricted Stock Unit Award (''CRSU'') Activity (Details) | The following table summarizes the restricted stock unit award (“RSU”) and cash restricted stock unit award (“CRSU”), activity for the three and six months ended June 30, 2021:
|  | RSU |  |  | Grant Date |  |  | CRSU |  |  | Grant Date |
|  | Number of |  |  | Fair Value |  |  | Number of |  |  | Fair Value |
|  | Shares |  |  | per share |  |  | Shares |  |  | per share |
Unvested at December 31, 2020 |  |  | 2,735,706 |  |  | $ | 22.4 |  |  |  | 624 |  |  | $ | 35.1 |
Granted |  |  | 190,838 |  |  |  | 107.1 |  |  |  | 3,025 |  |  |  | 111.9 |
Vested |  |  | (189,460 | ) |  |  | 22.8 |  |  |  | (3,405 | ) |  |  | 101.7 |
Forfeited |  |  | (13,840 | ) |  |  | 13.0 |  |  |  | — |  |  |  | — |
Unvested at March 31, 2021 |  |  | 2,723,244 |  |  | $ | 28.2 |  |  |  | 244 |  |  | $ | 58.4 |
Granted |  |  | 103,063 |  |  |  | 100.5 |  |  |  | — |  |  |  | — |
Vested |  |  | (221,049 | ) |  |  | 23.1 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (49,880 | ) |  |  | 29.6 |  |  |  | (244 | ) |  |  | 58.4 |
Unvested at June 30, 2021 |  |  | 2,555,378 |  |  | $ | 31.5 |  |  |  | — |  |  | $ | - |

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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 of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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