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Leases (Supplemental Lease Information) (Details) - USD ($)
$ in Thousands
6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Leases [Abstract]      
Operating lease - operating cash flows (fixed payments) $ 1,155 $ 1,411  
Operating lease - operating cash flows (liability reduction) 735 961  
Right of use assets obtained in exchange for new operating lease liabilities 66 $ 18  
Non-current assets - right of use assets, net 4,522   $ 5,100
Current liabilities - operating lease liabilities 1,432   1,470
Non-current liabilities - operating lease liabilities $ 4,903   $ 5,601