Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Revenue [Abstract]
Services	$ 13,256	$ 14,163	$ 13,609	$ 15,283	$ 14,418	$ 16,563	$ 19,295	$ 21,875	$ 56,311		$ 72,151		$ 77,272
Software and other	1,351	1,364	1,320	1,314	1,293	1,302	1,305	1,282	5,349		5,182		5,719
Total revenue	14,607	15,527	14,929	16,597	15,711	17,865	20,600	23,157	61,660		77,333		82,991
Costs of revenue [Abstract]
Cost of services	11,842	11,847	12,696	13,860	12,884	14,357	15,804	18,394	50,245		61,439		60,606
Cost of software and other	109	120	138	119	127	128	131	150	486		536		840
Total cost of revenue	11,951	11,967	12,834	13,979	13,011	14,485	15,935	18,544	50,731		61,975		61,446
Gross profit	2,656	3,560	2,095	2,618	2,700	3,380	4,665	4,613	10,929		15,358		21,545
Operating expenses [Abstract]
Research and development	1,113	1,336	1,420	1,708	1,713	1,790	1,930	1,524	5,577		6,957		5,078
Sales and marketing	1,270	1,463	1,866	2,072	2,053	2,195	2,089	2,208	6,671		8,545		7,206
General and administrative	2,772	2,703	4,235	3,248	3,828	3,047	3,076	3,060	12,958		13,011		11,320
Amortization of intangible assets and other	227	267	267	267	267	267	267	268	1,028		1,069		1,091
Restructuring	723	0	423	0					1,146		0		0
Goodwill impairment					0	0	14,240	0	0		14,240		0
Total operating expenses	6,105	5,769	8,211	7,295	7,861	7,299	21,602	7,060	27,380		43,822		24,695
Income (loss) from operations	(3,449)	(2,209)	(6,116)	(4,677)	(5,161)	(3,919)	(16,937)	(2,447)	(16,451)		(28,464)		(3,150)
Interest income and other, net	135	124	126	133	111	113	106	100	518		430		294
Loss from continuing operations, before income taxes	(3,314)	(2,085)	(5,990)	(4,544)	(5,050)	(3,806)	(16,831)	(2,347)	(15,933)		(28,034)		(2,856)
Income tax provision (benefit)	175	44	36	52	76	60	(1,227)	126	307		(965)		740
Loss from continuing operations, after income taxes	(3,489)	(2,129)	(6,026)	(4,596)	(5,126)	(3,866)	(15,604)	(2,473)	(16,240)		(27,069)		(3,596)
Income (loss) from discontinued operations, after income taxes	0	0	0	284	(4)	(5)	(5)	42	284		28		113
Net loss	$ (3,489)	$ (2,129)	$ (6,026)	$ (4,312)	$ (5,130)	$ (3,871)	$ (15,609)	$ (2,431)	$ (15,956)	[1]	$ (27,041)	[1]	$ (3,483)	[1]
Basic earnings (loss) per share [Abstract]
Loss from continuing operations, after income taxes (in dollars per share)	$ (0.19)	$ (0.12)	$ (0.33)	$ (0.24)	$ (0.27)	$ (0.21)	$ (0.87)	$ (0.15)	$ (0.88)		$ (1.49)		$ (0.20)
Income (loss) from discontinued operations, after income taxes (in dollars per share)	0	0	0	0	0	0	0	0.03	0.01		0		0.01
Basic net loss per share (in dollars per share)	(0.19)	(0.12)	(0.33)	(0.24)	(0.27)	(0.21)	(0.87)	(0.12)	(0.87)		(1.49)		(0.19)
Diluted earnings (loss) per share [Abstract]
Loss from continuing operations, after income taxes (in dollars per share)	(0.19)	(0.12)	(0.33)	(0.24)	(0.27)	(0.21)	(0.87)	(0.15)	(0.88)		(1.49)		(0.20)
Income (loss) from discontinued operations, after income taxes (in dollars per share)	0	0	0	0	0	0	0	0.03	0.01		0		0.01
Diluted net loss per share (in dollars per share)	$ (0.19)	$ (0.12)	$ (0.33)	$ (0.24)	$ (0.27)	$ (0.21)	$ (0.87)	$ (0.12)	$ (0.87)		$ (1.49)		$ (0.19)

[1] Prior periods adjusted to reflect the impact of the one-for-three reverse stock split that became effective on January 20, 2017, as discussed in Note 1.