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Supplemental Financial Information - Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Mar. 31, 2023
Property and Equipment, net    
Accumulated depreciation $ (6,130) $ (5,886)
Property and equipment, net 1,325 1,297
Equipment    
Property and Equipment, net    
Gross 6,631 6,359
Leasehold Improvements    
Property and Equipment, net    
Gross $ 824 $ 824