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Inventory (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
Inventory Disclosure [Abstract]          
Raw materials $ 4,074   $ 4,074   $ 2,412
Work in process 2,164   2,164   1,865
Sub-assembly 1,961   1,961   1,677
Finished goods 767   767   376
Total 8,966   8,966   $ 6,330
Inventory write-off $ 19 $ 60 $ 56 $ 194