CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue	$ 2,370	$ 2,931	$ 7,403	$ 9,698
Operating expenses:
Cost of revenue (exclusive of depreciation and amortization)	1,582	1,804	4,901	5,881
Research and development	190	215	652	690
Sales and marketing	38	58	111	278
General and administrative	1,035	1,170	2,917	3,132
Impairment charges	20	975	473	3,150
Depreciation and amortization	145	179	461	596
Total operating expenses	3,010	4,401	9,515	13,727
Loss from operations	(640)	(1,470)	(2,112)	(4,029)
Interest and other expense, net	0	0	(1)	(415)
Net loss	(640)	(1,470)	(2,113)	(4,444)
Preferred stock dividends	4	3	23	9
Net loss attributable to common stockholders	$ (644)	$ (1,473)	$ (2,136)	$ (4,453)
Net loss attributable to common stockholders per share:
Basic and diluted net loss per share (in dollars per share)	$ (0.12)	$ (0.30)	$ (0.42)	$ (0.94)
Weighted-average number of shares of common stock:
Basic and diluted (in shares)	5,184	4,885	5,128	4,749