CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 3,481	$ 4,344	$ 11,417	$ 14,950
Operating expenses:
Cost of revenue (exclusive of depreciation and amortization)	1,988	2,609	6,697	9,187
Research and development	296	229	875	817
Sales and marketing	69	70	369	576
General and administrative	970	1,664	2,843	4,009
Impairment charges	1,707	605	1,712	630
Depreciation and amortization	451	455	1,370	1,509
Total operating expenses	5,481	5,632	13,866	16,728
Loss from operations	(2,000)	(1,288)	(2,449)	(1,778)
Interest expense and other, net	(197)	(362)	(916)	(1,081)
Gain on extinguishment of debt	9,045	0	9,045	0
Amortization of debt discount	(28)	(18)	(64)	(54)
Interest and other income (expense), net	(8,820)	380	(8,065)	1,135
Income (loss) before income taxes	6,820	(1,668)	5,616	(2,913)
Income tax benefit (expense)	284	(37)	230	(108)
Net income (loss)	7,104	(1,705)	5,846	(3,021)
Preferred stock dividends	3	3	9	9
Net income (loss) attributable to common stockholders	$ 7,101	$ (1,708)	$ 5,837	$ (3,030)
Net income (loss) attributable to common stockholders per share:
Basic net income (loss) per share (in dollars per share)	$ 0.19	$ (0.05)	$ 0.16	$ (0.09)
Diluted net income (loss) per share (in dollars per share)	$ 0.19	$ (0.05)	$ 0.15	$ (0.09)
Weighted-average number of shares of common stock:
Basic (in shares)	36,897	35,492	37,078	35,480
Diluted (in shares)	37,897	35,492	38,078	35,480