Business Segments, Significant Customer and Geographic Information - Reconciliation of total segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Business Segments
Total income from reportable segments	$ (5,237)	$ (3,470)	$ (2,079)
Amortization of intangible assets	(281)	(360)	(431)
Change in fair value of contingent acquisition consideration			(9)
Other (expense) income, net	(7)	2	(20)
Interest income, net	13	12	6
Loss from continuing operations before income taxes	(5,231)	(3,456)	(2,093)
Operating segments
Business Segments
Total income from reportable segments	8,724	6,431	7,638
Unallocated amounts
Business Segments
Corporate and other expenses	(13,680)	(9,541)	(9,277)
Amortization of intangible assets	(281)	(360)	(431)
Change in fair value of contingent acquisition consideration			(9)
Other (expense) income, net	(7)	2	(20)
Interest income, net	13	12	6
Loss from continuing operations before income taxes	$ (5,231)	$ (3,456)	$ (2,093)