Leases (Supplemental Lease Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2020
Leases [Abstract]
Operating lease - operating cash flows (fixed payments)	$ 2,096	$ 2,012
Operating lease - operating cash flows (liability reduction)	1,289	1,044
Right of use assets obtained in exchange for new operating lease liabilities	77	7,904
Non-current assets - right of use assets, net	5,404	6,500	$ 6,500
Current liabilities - operating lease liabilities	1,529	1,695	1,695
Non-current liabilities - operating lease liabilities	$ 5,928	$ 7,051	$ 7,051