Property, plant and equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024
Property, plant and equipment, net
Property, plant and equipment , gross	$ 22,013		$ 20,380
Less: Accumulated depreciation	(10,610)		(9,897)
Property, plant and equipment , net	11,403		10,483
Depreciation and amortization expense	700	$ 600
Office equipment
Property, plant and equipment, net
Property, plant and equipment , gross	1,487		1,464
Computer equipment
Property, plant and equipment, net
Property, plant and equipment , gross	2,108		1,975
Plant and laboratory equipment
Property, plant and equipment, net
Property, plant and equipment , gross	10,560		10,423
Leasehold improvements
Property, plant and equipment, net
Property, plant and equipment , gross	1,886		1,886
Capitalized software
Property, plant and equipment, net
Property, plant and equipment , gross	4,938		3,515
Construction in progress
Property, plant and equipment, net
Property, plant and equipment , gross	$ 1,034		$ 1,117