Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (255,134)	$ (288,989)	$ (273,551)
Other comprehensive loss:
Foreign currency translation adjustment	(15,639)	(2,153)	483
Total other comprehensive (loss) income	(15,639)	(2,153)	483
Comprehensive loss	$ (270,773)	$ (291,142)	$ (273,068)