Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (27,373)	$ (23,139)	$ (48,656)
Other comprehensive (loss) gain, net of tax:
Foreign currency translation (losses) gains	(1,163)	968	(2,147)
Total other comprehensive (loss) gain, net of tax	(1,163)	968	(2,147)
Comprehensive loss	$ (28,536)	$ (22,171)	$ (50,803)