XML 39 R29.htm IDEA: XBRL DOCUMENT
v3.24.3

Stock-Based Awards (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2024
Stock-Based Awards |
Summary of assumptions used to determine fair value of stock options granted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Nine Months Ended
​ | ​ | September 30,
​ | ​ | 2024 | ​ | ​ | 2023 | ​
Risk-free interest rate |  | 3.85 | % | ​ | 3.53 | %
Expected term (in years) |  | 6.0 | ​ | ​ | 6.2 | ​
Expected volatility |  | 81.95 | % | ​ | 77.73 | %
Expected dividend yield |  | 0 | % | ​ | 0 | %
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
(In thousands, except share and per share data and years) | ​ | of Shares | ​ | Price | ​ | Term | ​ | Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | (in years) | ​ | ​ | ​
Outstanding as of December 31, 2023 |  | 6,419,455 | ​ | $ | 15.94 |  | 7.1 | ​ | $ | 14
Granted |  | 1,982,700 | ​ | ​ | 1.19 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (43,548) | ​ | ​ | 0.72 | ​ | ​ | ​ | ​ | 19
Forfeited and cancelled |  | (1,913,375) | ​ | ​ | 14.82 | ​ | ​ | ​ | ​ | ​
Outstanding as of September 30, 2024 |  | 6,445,232 | ​ | $ | 11.85 | ​ | 6.9 | ​ | $ | 13
Options vested and expected to vest as of September 30, 2024 |  | 6,445,232 | ​ | $ | 11.85 | ​ | 6.9 | ​ | $ | 13
Options exercisable as of September 30, 2024 |  | 3,512,137 | ​ | $ | 15.40 |  | 5.4 | ​ | $ | 3
​
Summary of restricted stock units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | ​
​ | ​ | ​ | ​ | Grant Date | ​ | Aggregate
​ | ​ | Number | ​ | Fair Value | ​ | Intrinsic
(In thousands, except share and per share data) | ​ | of Shares | ​ | Per Share | ​ | Value
Outstanding as of December 31, 2023 | ​ | 1,521,940 | ​ | $ | 15.72 | ​ | ​ | ​
Granted | ​ | 2,648,642 | ​ | ​ | 1.20 | ​ | ​ | ​
Vested | ​ | (542,846) | ​ | ​ | 12.43 | ​ | $ | 647
Forfeited and cancelled | ​ | (555,960) | ​ | ​ | 12.54 | ​ | ​ | ​
Outstanding as of September 30, 2024 | ​ | 3,071,776 | ​ | $ | 4.37 | ​ | ​ | ​
Summary of stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended |
​ | ​ | September 30, | ​ | September 30, |
(In thousands) |  | 2024 |  | 2023 |  | 2024 |  | 2023 |
Cost of revenue |  | $ | 232 |  | $ | 347 |  | $ | 707 |  | $ | 1,119 | ​
Research and development | ​ | ​ | 1,124 | ​ | ​ | 3,072 | ​ | ​ | 2,192 | ​ | ​ | 9,168 | ​
General and administrative | ​ |  | 1,648 | ​ |  | 2,529 | ​ |  | 5,097 | ​ |  | 8,989 | ​
Total stock-based compensation expense | ​ | $ | 3,004 | ​ | $ | 5,948 | ​ | $ | 7,996 | ​ | $ | 19,276 | ​

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 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration