Investment in Joint Venture - Summarized financial information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Variable Interest Entity [Line Items]
Gross loss	$ 1,174	$ 438	$ 3,262	$ 1,544
Variable Interest Entity, Not Primary Beneficiary | GaNovation
Variable Interest Entity [Line Items]
Sales	2,737,000	3,211	5,721,000	6,032
Gross loss	(1,850,000)	(2,211)	(4,202,000)	(4,248)
Net loss	$ (2,218,000)	$ (2,703)	$ (4,865,000)	$ (5,154)