Leases - Component of Lease Cost and Consolidated Balance Sheet Amounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 571	$ 406
Short-term lease cost	62	204
Variable lease cost	75	100
Sublease income	0	0
Total lease cost	708	$ 710
Operating leases
Operating lease right-of-use assets	7,851		$ 8,116
Operating lease liabilities	$ 8,433		$ 8,647
Weighted-average remaining lease term
Operating leases	14 years 5 months		14 years 4 months
Weighted-average discount rate
Operating Leases (as a percentage)	4.30%		4.50%