Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 1,046	$ 755	$ 2,126	$ 1,384
Gain from extinguishment of lease liabilities	0	(5,096)	0	(7,733)
Finance lease cost
Amortization of leased assets	247	249	495	499
Interest on lease liabilities	36	46	74	94
Total lease cost (gain)	$ 1,329	$ (4,046)	$ 2,695	$ (5,756)