Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 48,403	$ 75,195	$ 96,023
Cost of revenues	44,608	64,352	74,041
Gross profit	3,795	10,843	21,982
Operating expenses:
Research and development	11,594	12,540	12,303
Selling, general and administrative	22,577	25,688	28,861
Amortization of acquisition related intangibles	183	157	157
Loss on contingent consideration	71	0	0
Restructuring and impairment	1,527	0	779
Total operating expenses	35,952	38,385	42,100
Operating loss	(32,157)	(27,542)	(20,118)
Change in fair value of derivatives and warrants	706	1,304	(228)
Gain on sale of minority interests	1,167	325	3,092
Interest income (expense), net	147	(383)	(1,037)
Other (expense) income, net	(2,800)	65	(2,457)
Loss before income tax expense (benefit)	(32,937)	(26,231)	(20,748)
Income tax (benefit) expense	(161)	1,142	2,391
Net loss	$ (32,776)	$ (27,373)	$ (23,139)
Net loss per common share
Basic (in dollars per share)	$ (1.73)	$ (1.98)	$ (1.76)
Diluted (in dollars per share)	$ (1.73)	$ (1.98)	$ (1.76)
Weighted average number of common shares outstanding
Basic (in shares)	18,967	13,804	13,178
Diluted (in shares)	18,967	13,804	13,178