Credit risk related to accounts receivables - Schedule of Movements in the Allowance for Doubtful Debts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at April 1,	$ 5,575	$ 3,602
Bad debt provision	2,559	2,961	$ 3,941
Write-offs, net of recoveries	(2,855)	(1,656)
Foreign currency translation differences	147	668
Balance at March 31,	$ 5,426	$ 5,575	$ 3,602