CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (21,482)	$ (546)	$ (36,837)	$ (2,715)
Other comprehensive income (loss), net of tax
Unrealized gain on investments in securities	149	198	262	225
Foreign currency translation adjustment	(379)	1,192	(2,051)	2,983
Comprehensive income (loss)	$ (21,712)	$ 844	$ (38,626)	$ 493