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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2021
Summary of Time-Based RSUs Activity | Weighted average Number grant date of shares fair valueOutstanding at December 31, 2020 5,919 $ 5.25Granted 3,030 37.92Released (1,759) 4.83Forfeited (355) 14.05Outstanding at September 30, 2021 6,835 $ 19.39
Summary of Performance-Based RSUs Activity | Weighted average Number grant date of shares fair valueOutstanding at December 31, 2020 94 $ 2.63Granted — —Released — —Forfeited (94) 2.63Outstanding at September 30, 2021 — $ —
Schedule of Stock-Based Compensation Expense | Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of revenue$ 1,837 $ 735 $ 4,734 $ 1,714 Research and development 5,162 2,105 12,519 5,297 Sales, general and administrative 9,897 2,152 25,613 5,247 Merger-related expenses - stock-settled 6,349 — 6,349 — Merger-related expenses - milestone 5,202 — 5,202 —Stock-based compensation 28,447 4,992 54,417 12,258 Merger-related expenses - cash-settled 7,373 — 7,373 —Total stock-based compensation$ 35,820 $ 4,992 $ 61,790 $ 12,258
Schedule of Fair Value of Employee Stock Options | Three Months Ended September 30, Nine Months Ended September 30, Stock Option 2021 2020 2021 2020Expected term in years 2.1 - 4.6 5.1 2.1 - 4.6 5.1Expected volatility 67% - 80% 71% 67% - 80% 57% - 71%Risk-free interest rate 0.05% – 0.71% 0.30% 0.05% – 0.74% 0.3% - 1.2%Dividend yield — — — — Weighted average grant date fair value per share$5.97 $3.85 $15.63 $3.82
Schedule of Fair Value of Employee Stock Purchase Plan | Three Months Ended September 30, Nine Months Ended September 30, ESPP 2021 2020 2021 2020Expected term in years 0.5 - 2.0 0.5 - 2.0 0.5 - 2.0 0.5 - 2.0Expected volatility 67% 71% 67% - 68% 57% - 71%Risk-free interest rate 0.06% - 0.20% 0.1% 0.06% - 0.20% 0.1% - 1.0%Dividend yield — — — — Weighted average fair value per share$16.73 $3.13 $25.07 $1.87
Time-based stock options [Member] |
Summary of Stock Option Activity | Stock Options Outstanding Weighted Number average of shares Exercise price exercise priceOutstanding at December 31, 2020 14,638 $ 1.16 – 20.90 $ 5.53Granted 2,329 23.39 – 46.37 34.40Assumed Omniome options 339 2.05 – 4.90 4.43Exercised (4,406) 1.16 – 15.98 5.37Canceled (501) 2.54 – 46.37 5.28Outstanding at September 30, 2021 12,399 $1.16 – 46.37 $ 10.99
Performance-based stock options [Member] |
Summary of Stock Option Activity | Stock Options Outstanding Weighted Number average of shares Exercise price exercise priceOutstanding at December 31, 2020 — $ — $ —Granted — — —Assumed Omniome options 304 4.71 - 4.90 4.71Exercised — — —Canceled — — —Outstanding at September 30, 2021 304 $4.71 - 4.90 $ 4.71

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