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Property, plant and equipment, net (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2022
Property, plant and equipment, net          
Property, plant and equipment , gross $ 13,942   $ 13,942   $ 12,728
Less: Accumulated depreciation (6,032)   (6,032)   (4,795)
Property, plant and equipment , net 7,910   7,910   7,933
Depreciation and amortization expense 617 $ 532 1,237 $ 1,050  
Office equipment          
Property, plant and equipment, net          
Property, plant and equipment , gross 995   995   937
Computer equipment          
Property, plant and equipment, net          
Property, plant and equipment , gross 1,893   1,893   1,667
Plant and laboratory equipment          
Property, plant and equipment, net          
Property, plant and equipment , gross 8,285   8,285   7,720
Leasehold improvements          
Property, plant and equipment, net          
Property, plant and equipment , gross 1,696   1,696   785
Construction in progress          
Property, plant and equipment, net          
Property, plant and equipment , gross $ 1,073   $ 1,073   $ 1,619