Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 8,214	$ 9,746
Cost of revenues	6,780	7,009
Gross profit	1,434	2,737
Operating expenses:
Research and development	1,069	1,762
Selling, general and administrative	2,726	3,400
Severance and other charges	0	792
Total operating expenses	3,795	5,954
Loss from operations	(2,361)	(3,217)
Other (expense) income:
Interest expense, net	(103)	(392)
Loss on extinguishment of debt	(194)	0
(Loss) gain on change in fair value of liability-classified warrants	(338)	796
Other expense, net	(101)	(380)
Total other (expense) income	(736)	24
Loss from operations before income taxes	(3,097)	(3,193)
Income tax benefit	(1)	(422)
Net loss	(3,096)	(2,771)
Foreign currency translation adjustments	10	263
Comprehensive loss	$ (3,086)	$ (2,508)
Basic and diluted net loss per common share:
Net loss (in dollars per share)	$ (0.20)	$ (0.76)
Weighted average shares outstanding - basic and diluted (in shares)	15,703	3,647