Stock-based compensation - Additional Information (Details) $ / shares in Units, $ in Millions			3 Months Ended
	Apr. 01, 2023 shares	Jul. 09, 2018 shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 $ / shares shares	Apr. 01, 2022 shares	Jul. 31, 2017
Stock-Based Compensation
Conversion ratio						1
Total unrecognized compensation cost | $			$ 34.5
Expenses expected to be recognized over a weighted average remaining period			2 years 9 months 18 days
Weighted average grant-date fair value per share of stock options granted | $ / shares			$ 5.37	$ 12.09
Value of stock options exercised | $			$ 0.1
2017 Plan
Stock-Based Compensation
Shares authorized (in shares)			2,659,885
Number of shares available for grant		2,520,247	0
2018 Plan
Stock-Based Compensation
Shares authorized (in shares)		3,617,968
Number of shares available for grant			1,988,217
Share based payment award percentage of outstanding shares		4.00%
Additional shares authorized (in shares)	2,667,868
2018 Plan | Pre-funded warrants
Stock-Based Compensation
Common stock reserved for issuance (in shares)		5,281,616
ESPP
Stock-Based Compensation
Share based payment award percentage of outstanding shares		1.00%
Common stock reserved for issuance (in shares)	3,405,175	348,612			3,405,175
Additional shares authorized (in shares)	666,967	697,224
Out Of Plan Inducement Grants
Stock-Based Compensation
Stock unit grant (in shares)				0
Stock options
Stock-Based Compensation
Exercise price for persons holding ten percent of voting power (as a percent)			100.00%
Exercise price for persons holding more than ten percent of voting power (as a percent)			110.00%
Share based payment award expiration period			10 years
Share based payment award vesting period			4 years
Total unrecognized compensation cost | $			$ 35.7
Expenses expected to be recognized over a weighted average remaining period			2 years 9 months 18 days
Stock options | Maximum
Stock-Based Compensation
Expiration period for persons holding ten percent of voting power			5 years
Stock options | Minimum
Stock-Based Compensation
Expiration period for persons holding more than ten percent of voting power			10 years
RSUs
Stock-Based Compensation
Share based payment award vesting period			4 years
RSUs | Out Of Plan Inducement Grants
Stock-Based Compensation
Stock unit grant (in shares)			50,000
PSUs
Stock-Based Compensation
Total unrecognized compensation cost | $			$ 4.8
PSUs | 2018 Plan
Stock-Based Compensation
Stock unit grant (in shares)			246,110
Nonqualified Stock Options | Out Of Plan Inducement Grants
Stock-Based Compensation
Stock unit grant (in shares)			75,000