Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Total revenues	$ 28,353	$ 36,839
Cost of revenues	22,455	28,773
Gross profit	5,898	8,066
Operating expenses:
Research and development	3,970	4,657
Selling, general and administrative	8,292	11,837
Goodwill impairment	0	4,675
Severance and other charges	(480)	2,555
Total operating expenses	11,782	23,724
Loss from continuing operations	(5,884)	(15,658)
Other (expense) income:
Interest expense, net	(260)	(1,535)
Gain on change in fair value of bifurcated derivative liability	0	2,754
Loss on extinguishment of debt	(194)	(12,410)
Gain on change in fair value of liability - classified warrants	523	1,554
Gain on sale of DuraFit business	805	0
Other (expense) income, net	(188)	863
Total other income (expense)	686	(8,774)
Loss from operations before income taxes	(5,198)	(24,432)
Income tax expense (benefit) from operations	85	(958)
Net loss	(5,283)	(23,474)
Foreign currency translation adjustments	443	(942)
Comprehensive loss	$ (4,840)	$ (24,416)
Basic and diluted net loss per share:
Earnings Per Share, Basic and Diluted	$ (0.34)	$ (3.84)
Weighted-average number of common shares outstanding—basic and diluted (in shares)	15,744	6,107