Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Revenues	$ 9,499	$ 9,272	$ 7,662	$ 5,681	$ 6,671	$ 7,875	$ 6,679	$ 7,299	$ 32,115	$ 28,524	$ 24,171
Gross profit	1,971	2,129	1,693	732	1,127	1,854	2,150	1,656	6,525	6,787	6,404
Loss from continuing operations	(2,848)	(2,061)	(3,342)	(2,103)	(1,229)	77	(1,911)	(2,851)	(10,354)	(5,913)	(12,680)
Income (loss) from discontinued operations	(438)	(57)	(21)	(4)	(440)	(1,385)	(902)	166	(520)	(2,562)	1,405
Net loss	$ (3,286)	$ (2,118)	$ (3,363)	$ (2,107)	$ (1,669)	$ (1,308)	$ (2,813)	$ (2,685)	$ (10,874)	$ (8,475)	$ (11,275)
Basic (loss) earnings/income per share: Loss from continuing operations (usd per share)	$ (0.04)	$ (0.03)	$ (0.05)	$ (0.03)	$ (0.02)	$ 0.00	$ (0.03)	$ (0.04)	$ (0.14)	$ (0.08)	$ (0.18)
Basic (loss) earnings/income per share: (Loss) income from discontinued operations (usd per share)	(0.01)	0.00	0.00	0.00	(0.01)	(0.02)	(0.01)	0.00	0.00	(0.04)	0.02
Net loss, basic (usd per share)	(0.04)	(0.03)	(0.05)	(0.03)	(0.02)	(0.02)	(0.04)	(0.04)	(0.14)	(0.12)	(0.16)
Diluted (loss) earnings/income per share: Loss from continuing operations (usd per share)	(0.04)	(0.03)	(0.05)	(0.03)	(0.02)	0.00	(0.03)	(0.04)	(0.14)	(0.08)	(0.18)
Diluted (loss) earnings/income per share: (Loss) income from discontinued operations (usd per share)	(0.01)	0.00	0.00	0.00	(0.01)	(0.02)	(0.01)	0.00	0.00	(0.04)	0.02
Net loss, diluted (usd per share)	$ (0.04)	$ (0.03)	$ (0.05)	$ (0.03)	$ (0.02)	$ (0.02)	$ (0.04)	$ (0.04)	$ (0.14)	$ (0.12)	$ (0.16)