v3.25.4

Stock-based compensation (Tables) | 9 Months Ended
--- | ---
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of stock-based compensation expense | Stock-based compensation expense was classified in the consolidated statements of operations as follows:
| Three Months Ended December 31, |  | Nine Months Ended December 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Research and development | $ | 3,609 |  |  | $ | 4,573 |  |  | $ | 12,677 |  |  | $ | 13,927 |
Selling, general and administrative | 3,438 |  |  | 4,066 |  |  | 11,470 |  |  | 12,837 |
| $ | 7,047 |  |  | $ | 8,639 |  |  | $ | 24,147 |  |  | $ | 26,764 |
The following table summarizes stock-based compensation expense by award type for the three and nine months ended December 31, 2025 and 2024:
| Three Months Ended December 31, |  | Nine Months Ended December 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Stock options | $ | 3,630 |  |  | $ | 4,839 |  |  | $ | 11,928 |  |  | $ | 15,466 |
Restricted and performance stock units | 3,417 |  |  | 3,800 |  |  | 12,219 |  |  | 11,298 |
| $ | 7,047 |  |  | $ | 8,639 |  |  | $ | 24,147 |  |  | $ | 26,764 |
Schedule of assumptions used to determine the grant-date fair value of stock options granted | The following table presents, on a weighted-average basis, the assumptions that the Company used to determine the grant-date fair value of stock options granted to employees and directors:
| Three Months Ended December 31, | Nine Months Ended December 31,
| 2025 |  | 2024 | 2025 |  | 2024
Risk-free interest rate | 3.75 | % |  | 4.10 | % | 3.97 | % |  | 4.36 | %
Expected term (in years) | 6.1 |  | 6.1 | 6.0 |  | 6.0
Expected volatility | 107.2 | % |  | 76.5 | % | 76.9 | % |  | 76.3 | %
Expected dividend yield | 0 | % |  | 0 | % | 0 | % |  | 0 | %
Schedule of of stock option activity | The following table summarizes the Company’s stock option activity:
| Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding as of March 31, 2025 | 10,214,878 |  |  | $ | 15.22 |  |  | 6.24 |  | $ | 10,652 |
Granted | 2,183,724 |  |  | $ | 8.42 |  |  |  |  |
Exercised | (70,966) |  |  | $ | 4.08 |  |  |  |  |
Cancelled | (399,666) |  |  | $ | 13.60 |  |  |  |  |
Outstanding as of December 31, 2025 | 11,927,970 |  |  | $ | 14.10 |  |  | 5.83 |  | $ | 12,758 |
Options exercisable as of December 31, 2025 | 8,014,980 |  |  | $ | 16.09 |  |  | 4.48 |  | $ | 8,281 |
Options vested and expected to vest as of December 31, 2025 | 11,927,970 |  |  | $ | 14.10 |  |  | 5.83 |  | $ | 12,758 |
Schedule of share-based payment arrangement, restricted stock and restricted stock unit, activity | A summary of the changes in the Company's RSUs and PSUs during the nine months ended December 31, 2025 is as follows:
| Number of Restricted Shares |  | Weighted Average Grant Date Fair Value
Outstanding as of March 31, 2025 | 3,611,774 |  |  | 12.40 |
Granted | 3,464,911 |  |  | 8.82 |
Vested | (898,310) |  |  | 16.33 |
Cancelled | (515,352) |  |  | 10.57 |
Outstanding as of December 31, 2025 | 5,663,023 |  |  | $ | 9.76 |

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 -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

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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration