Revenue from contracts with customers - Summary of Recognized Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Capitalized Contract Cost [Line Items]
Amortization recognized during the period	$ (988)	$ (857)	$ (1,929)	$ (1,767)
Cost of Revenue
Capitalized Contract Cost [Line Items]
Amortization recognized during the period	(732)	(616)	(1,472)	(1,291)
Sales and Marketing
Capitalized Contract Cost [Line Items]
Amortization recognized during the period	$ (256)	$ (241)	$ (457)	$ (476)