v3.25.4

Collaboration and other arrangements (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Significant agreements
Research and development	$ 53,140,000	$ 48,004,000	$ 168,860,000	$ 135,472,000
Prepaid expenses and other current assets	8,262,000		$ 8,262,000		$ 8,351,000
Roche
Significant agreements
Termination period			60 days
Prepaid expenses and other current assets	0		$ 0		$ 0
Roche | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Significant agreements
Research and development	0	0	0	0
Proceeds from collaborators	$ 0.0	$ 1,800,000	$ 0.0	$ 1,800,000

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References

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Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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