CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenue	$ 2,594	$ 3,474
Operating expenses:
Cost of revenue (exclusive of depreciation and amortization)	1,675	2,147
Research and development	213	250
Sales and marketing	33	177
General and administrative	1,112	898
Impairment charges	0	650
Depreciation and amortization	159	232
Total operating expenses	3,192	4,354
Loss from operations	(598)	(880)
Interest and other expense, net	0	(405)
Net loss	(598)	(1,285)
Preferred stock dividends	15	3
Net loss attributable to common stockholders	$ (613)	$ (1,288)
Net loss attributable to common stockholders per share:
Basic and diluted net loss per share (in dollars per share)	$ (0.12)	$ (0.28)
Weighted-average number of shares of common stock:
Basic and diluted (in shares)	5,104	4,623