XML 44 R29.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Stock award plan - (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2024
Share-based Payment Arrangement [Abstract] |
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted- |  |  | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | average | ​ | ​ | Aggregate
​ | ​ | ​ | ​ | average | ​ | remaining | ​ | ​ | intrinsic
​ | ​ | Number of | ​ | exercise | ​ | contractual | ​ | ​ | value(in
​ | ​ | options | ​ | price | ​ | term | ​ | ​ | thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​
Outstanding at December 31, 2023 |  | 9,600,399 | ​ | $ | 43.59 |  |  |  | ​ | ​ |
Granted |  | 864,855 | ​ | $ | 25.70 |  |  |  | ​ | ​ |
Exercised |  | (192,210) | ​ | $ | 22.10 |  |  |  | ​ | ​ |
Forfeited/Cancelled |  | (991,305) | ​ | $ | 45.80 |  |  |  | ​ | ​ |
Outstanding at June 30, 2024 |  | 9,281,739 | ​ | $ | 42.13 |  | 5.77 | years | ​ | $ | 14,161
Vested or Expected to vest at June 30, 2024 |  | 1,904,403 | ​ | $ | 37.27 |  | 8.54 | years | ​ | $ | 4,115
Exercisable at June 30, 2024 |  | 7,177,321 | ​ | $ | 43.68 |  | 4.94 | years | ​ | $ | 9,453
​
Schedule of assumptions used to estimate fair values of grants made on the date of grant | ​
​ | ​ | ​ | ​
​ |  | Six months ended |
​ |  | June 30, 2024 |
Risk-free interest rate |  | 4.23% - 4.66% |
Expected volatility |  | 53% - 54% |
Expected term |  | 5.5 years |
Summary of information on the Company's restricted stock | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Restricted Stock Awards and Units
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant
​ | ​ | Number of | ​ | Date
​ |  | Shares |  | Fair Value
Unvested at December 31, 2023 | ​ | 2,866,270 | ​ | $ | 41.82
Granted |  | 1,800,930 | ​ | ​ | 25.72
Vested |  | (891,879) | ​ | ​ | 44.35
Forfeited |  | (172,476) | ​ | ​ | 37.61
Unvested at June 30, 2024 |  | 3,602,845 | ​ | $ | 33.35
Schedule of share-based compensation expense recorded in the statement of operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30, | ​
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 | ​
Research and development | ​ | $ | 9,428 | ​ | $ | 15,529 | ​ | $ | 18,395 | ​ | $ | 30,842 | ​
Selling, general and administrative | ​ |  | 9,815 | ​ |  | 13,842 | ​ |  | 19,226 | ​ |  | 27,344 | ​
Total | ​ | $ | 19,243 | ​ | $ | 29,371 | ​ | $ | 37,621 | ​ | $ | 58,186 | ​
​

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 -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + 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 -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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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