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Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Disclosure of reserves within equity [line items]    
Balance - Beginning of fiscal year $ 2,677 $ 9,715
Other comprehensive income (loss) (5,734) (7,038)
Balance - End of fiscal year (3,057) 2,677
Foreign currency differences on translation of foreign operations    
Disclosure of reserves within equity [line items]    
Balance - Beginning of fiscal year 2,654 9,715
Other comprehensive income (loss) (5,586) (7,061)
Balance - End of fiscal year (2,932) 2,654
Hedging reserve    
Disclosure of reserves within equity [line items]    
Balance - Beginning of fiscal year 23 0
Other comprehensive income (loss) (148) 23
Balance - End of fiscal year $ (125) $ 23