Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,350)	$ (11,721)	$ (3,765)
Other comprehensive loss, net of tax:
Unrealized foreign currency translation adjustments	(51)	(27)	(26)
Total comprehensive loss	$ (8,401)	$ (11,748)	$ (3,791)