Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (70,568)	$ (65,770)	$ (138,472)	$ (127,904)
Other comprehensive income (loss):
Foreign currency translation adjustment	281	(72)	(538)	353
Total other comprehensive income (loss)	281	(72)	(538)	353
Comprehensive loss	$ (70,287)	$ (65,842)	$ (139,010)	$ (127,551)