Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Loss	$ (288,989)	$ (273,551)	$ (143,255)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(2,153)	483	(116)
Total other comprehensive (loss) income	(2,153)	483	(116)
Comprehensive loss	$ (291,142)	$ (273,068)	$ (143,371)