Condensed Consolidated Statements of Comprehensive 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	$ (65,770)	$ (29,908)	$ (127,904)	$ (53,225)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(72)	(116)	353	148
Total other comprehensive (loss) income	(72)	(116)	353	148
Comprehensive loss	$ (65,842)	$ (30,024)	$ (127,551)	$ (53,077)