CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (104,497)	$ (4,751)	$ (5,120)
Other comprehensive loss, net of tax
Unrealized gain (loss) on investments in securities	(259)	70	(50)
Foreign currency translation adjustment	4,256	(5,528)	(2,025)
Comprehensive loss	$ (100,500)	$ (10,209)	$ (7,195)