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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of weighted-average assumptions used for stock option awards | The assumptions used in the Company's valuation are summarized as follows, presented on a weighted average basis:
|  | Year Ended December 31, 2021 |  | Year Ended December 31, 2020
Risk-free interest rate |  | 1.05 | % |  | 0.29 | %
Expected term (in years) |  | 5.7 |  | 5.9
Expected volatility |  | 74.5 | % |  | 71.9 | %
Expected annual dividends per share |  | — | % |  | — | %
Schedule of stock option activity | The following table summarizes the Company's stock option activity for the year ended December 31, 2021:
|  | Number of share options |  | Weighted average exercise price |  | Weighted average remaining contractual term |  | Aggregate intrinsic value
Outstanding as of December 31, 2020 |  | 3,672,968 |  |  | $ | 2.90 |  |  | 8.9 years |  | $ | 6,641 |
Granted |  | 13,262,016 |  |  | $ | 5.76 |  |  |  |  |
Forfeited |  | (2,012,851) |  |  | $ | 3.61 |  |  |  |  |
Exercised |  | (1,124,577) |  |  | $ | 2.74 |  |  |  |  |
Outstanding as of December 31, 2021 |  | 13,797,556 |  |  | $ | 5.55 |  |  | 8.6 years |  | $ | 712 |
Outstanding as of December 31, 2021 - vested and expected to vest |  | 12,685,817 |  |  | $ | 5.51 |  |  | 8.6 years |  | $ | 709 |
Exercisable at December 31, 2021 |  | 1,598,709 |  |  | $ | 3.60 |  |  | 7.2 years |  | $ | 406 |
Schedule of RSU activity | The following table summarizes the activity relating to RSUs for the year ended December 31, 2021:
|  |  | Number of Shares |  | Weighted Average Grant Date Fair Value |
RSUs - beginning of period |  |  | 26,923 |  |  | $ | 1.60 |  |
Vested |  |  | (26,923) |  |  | $ | 1.60 |  |
RSUs - end of period |  |  | — |  |  | $ | — |  |
Schedule of stock-based compensation expense | Stock‑based compensation expense related to stock options is recorded within the consolidated statements of operations and comprehensive loss as follows:
|  | Year Ended December 31, 2021 |  | Year Ended December 31, 2020
Research and development |  | $ | 5,909 |  |  | $ | 749 |
General and administrative |  | 6,895 |  |  | 1,017 |
Total stock-based compensation |  | $ | 12,804 |  |  | $ | 1,766 |

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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 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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- 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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