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Stock-Based Awards (Tables) | 12 Months Ended
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Dec. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Option Activity | The following summarizes stock option activity during the years ended December 31, 2021, 2020 and 2019:
|  | Options Issued Under Plan (in thousands) |  |  | Nonemployee Options (in thousands) |  |  | Total Options (in thousands) |  |  | Weighted- Average Exercise Price Per Share |  |  | Weighted-Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding as of December 31, 2018 |  |  | 3,947 |  |  |  | 68 |  |  |  | 4,015 |  |  | $ | 2.81 |  |  |  | 8.84 |  |  | $ | 22,106 |
Retroactive conversion of shares due to Business Combination |  |  | 25,786 |  |  |  | 446 |  |  |  | 26,232 |  |  |  | (2.44 | ) |  |  |  |  |  |
Outstanding as of December 31, 2018, as converted |  |  | 29,733 |  |  |  | 514 |  |  |  | 30,247 |  |  |  | 0.37 |  |  |  | 8.84 |  |  |  | 22,106 |
Granted |  |  | 3,337 |  |  |  | 38 |  |  |  | 3,375 |  |  |  | 1.24 |  |  |  |  |  |  |
Exercised |  |  | (576 | ) |  |  | — |  |  |  | (576 | ) |  |  | 0.29 |  |  |  |  |  |  |
Forfeited |  |  | (9,377 | ) |  |  | — |  |  |  | (9,377 | ) |  |  | 0.25 |  |  |  |  |  |  |
Outstanding as of December 31, 2019 |  |  | 23,117 |  |  |  | 552 |  |  |  | 23,669 |  |  |  | 0.55 |  |  |  | 7.71 |  |  |  | 16,275 |
Granted |  |  | 4,294 |  |  |  | 964 |  |  |  | 5,258 |  |  |  | 1.22 |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |  |  |
Forfeited |  |  | (1,336 | ) |  |  | — |  |  |  | (1,336 | ) |  |  | 0.54 |  |  |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 26,075 |  |  |  | 1,516 |  |  |  | 27,591 |  |  |  | 0.68 |  |  |  | 7.40 |  |  |  | 14,619 |
Granted |  |  | 1,559 |  |  |  | — |  |  |  | 1,559 |  |  |  | 1.22 |  |  |  |  |  |  |
Exercised |  |  | (1,947 | ) |  |  | (543 | ) |  |  | (2,490 | ) |  |  | 0.36 |  |  |  |  |  |  |
Forfeited |  |  | (526 | ) |  |  | (558 | ) |  |  | (1,084 | ) |  |  | 0.85 |  |  |  |  |  |  |
Outstanding as of December 31, 2021 |  |  | 25,161 |  |  |  | 415 |  |  |  | 25,576 |  |  |  | 0.73 |  |  |  | 6.82 |  |  |  | 137,170 |
Exercisable as of December 31, 2021 |  |  |  |  |  |  |  |  | 19,065 |  |  |  | 0.62 |  |  |  | 6.31 |  |  |  | 86,526 |
Vested and expected to vest as of December 31, 2021 |  |  |  |  |  |  |  |  | 25,576 |  |  |  | 0.73 |  |  |  | 6.82 |  |  |  | 137,170 |
Schedule Of assumptions used in the Black-Scholes Model for options granted | The range of assumptions used in the Black-Scholes Model for options granted during 2021 prior to the Business Combination are as follows:
|  | 2021 Range |
Expected term (in years) |  | 5.97 - 6.10 |
Risk-free interest rate |  | 0.64% - 0.67% |
Expected volatility |  | 52.5% - 52.7% |
Dividend yield |  |  | — |
Fair value on grant date |  | $4.49 - $4.55 |
Summary of Restricted Stock Activity | The following summarizes RSU award activity during the year ended December 31, 2021:
| Number of RSUs (in thousands) |  | Weighted Average Grant Date Fair Value |
Outstanding as of December 31, 2020 |  | — |  | $ | — |
Granted |  | 203 |  |  | 7.88 |
Vested and settled |  | — |  |  | — |
Forfeited |  | — |  |  | — |
Outstanding as of December 31, 2021 |  | 203 |  |  | 7.88 |

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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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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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