Stock-based compensation - Share-Based Payment Arrangement, Option, Exercise Price Range (Details)	12 Months Ended
Mar. 31, 2026 $ / shares shares
Options outstanding
Options outstanding (in shares) \| shares	3,520,850
Weighted average remaining contractual life (in years)	2 years 9 months 18 days
Weighted average exercise price (in USD per share)	$ 27.48
Options exercisable
Number of shares exercisable (in shares) \| shares	316,280
Weighted average exercise price (in USD per share)	$ 21.00
Less than $20
Options outstanding
Options outstanding (in shares) \| shares	0
Weighted average exercise price (in USD per share)	$ 0
Options exercisable
Number of shares exercisable (in shares) \| shares	0
Less than $20 \| Maximum
Options outstanding
Weighted average exercise price (in USD per share)	$ 20.00
$20.00 - $40.00
Options outstanding
Options outstanding (in shares) \| shares	2,590,241
Weighted average remaining contractual life (in years)	1 year
Weighted average exercise price (in USD per share)	$ 21.00
Options exercisable
Number of shares exercisable (in shares) \| shares	316,280
Weighted average exercise price (in USD per share)	$ 21.00
$20.00 - $40.00 \| Maximum
Options outstanding
Weighted average exercise price (in USD per share)	40.00
$20.00 - $40.00 \| Minimum
Options outstanding
Weighted average exercise price (in USD per share)	$ 20.00
$40.00 - $60.00
Options outstanding
Options outstanding (in shares) \| shares	930,609
Weighted average remaining contractual life (in years)	8 years
Weighted average exercise price (in USD per share)	$ 45.52
Options exercisable
Number of shares exercisable (in shares) \| shares	0
$40.00 - $60.00 \| Maximum
Options outstanding
Weighted average exercise price (in USD per share)	$ 60.00
$40.00 - $60.00 \| Minimum
Options outstanding
Weighted average exercise price (in USD per share)	$ 40.00

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (e)(1)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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