XML 51 R36.htm IDEA: XBRL DOCUMENT
v3.22.4

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Summary of restricted stock activity | The following table summarizes the Company’s restricted stock unit activity:
| Shares |  | Weighted Average Grant Date Fair Value
Unvested as of December 31, 2021 | 440,079 |  |  | $ | 41.86 |
Issued | 676,828 |  |  | 14.54 |
Vested | (104,803) |  |  | 44.89 |
Forfeited | (268,154) |  |  | 22.08 |
Unvested as of December 31, 2022 | 743,950 |  |  | $ | 23.07 |
Summary of stock option activity | The following table summarizes the Company’s stock option activity:
| Number of Shares |  | Weighted Average Exercise Price per Share |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
|  |  |  |  | (In years) |  | (In thousands)
Outstanding as of December 31, 2021 | 6,468,501 |  |  | $ | 16.92 |  |  |  |  |
Granted | 3,969,302 |  |  | 9.23 |  |  |  |  |
Exercised | (265,662) |  |  | 3.04 |  |  |  |  | $ | 850 |
Cancelled or Forfeited | (1,334,113) |  |  | 16.64 |  |  |  |  |
Outstanding as of December 31, 2022 | 8,838,028 |  |  | $ | 13.93 |  |  | 8.26 |  | $ | 514 |
Exercisable as of December 31, 2022 | 3,315,240 |  |  | $ | 14.86 |  |  | 7.50 |  | $ | 95 |
Vested and expected to vest as of December 31, 2022 | 8,635,022 |  |  | $ | 13.90 |  |  | 8.30 |  | $ | 497 |
Schedule of fair value of stock option awards on the grant date using the Black-Scholes option valuation model |
| Year Ended December 31,
| 2022 |  | 2021
Risk-free interest rate | 2.52 | % |  | 0.86 | %
Expected term (in years) | 6.07 |  | 6.08
Expected volatility | 89.20 | % |  | 85.52 | %
Expected dividend yield | — | % |  | — | %
Weighted average grant-date fair value per share | $ | 6.65 |  |  | $ | 27.58 |
Summary of stock-based compensation expense | Stock-based compensation expense was allocated as follows (in thousands):
| Year Ended December 31,
| 2022 |  | 2021
Research and development | $ | 9,972 |  |  | $ | 9,350 |
General and administrative | 18,621 |  |  | 13,343 |
Total stock-based compensation expense | $ | 28,593 |  |  | $ | 22,693 |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration