Leases - Summary of Components of Operating Lease Costs (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 costs	$ 2,093	$ 2,514	$ 4,184	$ 4,677
Short-term lease costs	6	67	13	93
Variable lease costs	289	198	586	337
Less: Sublease income	(123)	(28)	(248)	(56)
Total operating lease costs	$ 2,265	$ 2,751	$ 4,535	$ 5,051