Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Total revenues	$ 36,839	$ 39,738
Cost of revenues	28,773	28,846
Gross profit	8,066	10,892
Operating expenses:
Research and development	4,657	7,826
Selling, general and administrative	11,837	11,903
Goodwill impairment	4,675	0
Severance and other charges	2,555	1,482
Total operating expenses	23,724	21,211
Loss from continuing operations	(15,658)	(10,319)
Other (expense) income:
Interest expense, net	(1,535)	(1,166)
Gain on change in fair value of bifurcated derivative liability	2,754	0
Loss on extinguishment of convertible debt	(12,410)	0
Gain on change in fair value of liability-classified warrants	1,554	2,617
Other income, net	863	47
Total other (expense) income	(8,774)	1,498
Loss from continuing operations before income tax benefit	(24,432)	(8,821)
Income tax benefit from continuing operations	(958)	(399)
Net loss from continuing operations	(23,474)	(8,422)
Net loss from discontinued operations	0	(112)
Net loss	(23,474)	(8,534)
Foreign currency translation adjustments	(942)	(2,522)
Comprehensive loss	$ (24,416)	$ (11,056)
Basic and diluted net loss per share:
Net loss from continuing operations (in dollars per share)	$ (3.84)	$ (2.67)
Net loss from discontinued operations (in dollars per share)	0.00	(0.04)
Net loss (in dollars per share)	$ (3.84)	$ (2.71)
Weighted-average number of common shares outstanding—basic and diluted (in shares)	6,107	3,151