Investment in Joint Venture - Investment activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
GaNovation
Summary of Variable Interest Entities [Roll Forward]
Beginning Balance	$ 143
Investment	3,320
Loss	(2,724)
Gain	0
Effect of exchange rate change	(24)
Ending Balance	715	$ 143
GaNovation/AFSW
Summary of Variable Interest Entities [Roll Forward]
Beginning Balance	$ 143	(1,866)
Investment		4,526
Loss		(3,971)
Gain		1,455
Effect of exchange rate change		(1)
Ending Balance		$ 143