Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues	$ 8,399	$ 8,406	$ 16,613	$ 18,152
Cost of revenues	6,455	6,719	13,235	13,728
Gross profit	1,944	1,687	3,378	4,424
Operating expenses:
Research and development	987	1,431	2,056	3,193
Selling, general and administrative	1,916	2,827	4,642	6,227
Severance and other charges	(619)	581	(619)	1,373
Total operating expenses	2,284	4,839	6,079	10,793
Loss from operations	(340)	(3,152)	(2,701)	(6,369)
Other income (expense):
Interest expense, net	(64)	(691)	(167)	(1,083)
Gain on bifurcated derivative liability	0	2,754	0	2,754
Loss on extinguishment of debt	0	(1,630)	(194)	(1,630)
Gain (loss) on change in fair value of liability-classified warrants	4	792	(334)	1,588
Other income, net	184	1,008	83	628
Total other income (expense)	124	2,233	(612)	2,257
Loss from operations before income taxes	(216)	(919)	(3,313)	(4,112)
Income tax expense (benefit)	169	(697)	168	(1,119)
Net loss	(385)	(222)	(3,481)	(2,993)
Foreign currency translation adjustments	211	(533)	221	(270)
Comprehensive loss	$ (174)	$ (755)	$ (3,260)	$ (3,263)
Basic and diluted net loss per common share:
Net loss (in dollars per share)	$ (0.02)	$ (0.06)	$ (0.22)	$ (0.80)
Weighted average shares outstanding - basic and diluted (in shares)	15,708	3,848	15,706	3,747