CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 2,439	$ 3,293	$ 5,033	$ 6,767
Operating expenses:
Cost of revenue (exclusive of depreciation and amortization)	1,644	1,930	3,319	4,077
Research and development	249	225	462	475
Sales and marketing	40	43	73	220
General and administrative	770	1,064	1,882	1,962
Impairment charges	453	1,525	453	2,175
Depreciation and amortization	157	185	316	417
Total operating expenses	3,313	4,972	6,505	9,326
Loss from operations	(874)	(1,679)	(1,472)	(2,559)
Interest and other expense, net	(1)	(10)	(1)	(415)
Net loss	(875)	(1,689)	(1,473)	(2,974)
Preferred stock dividends	4	3	19	6
Net loss attributable to common stockholders	$ (879)	$ (1,692)	$ (1,492)	$ (2,980)
Net loss attributable to common stockholders per share:
Basic and diluted net loss per share (in dollars per share)	$ (0.17)	$ (0.36)	$ (0.29)	$ (0.64)
Weighted-average number of shares of common stock:
Basic and diluted (in shares)	5,163	4,736	5,134	4,681