CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 1,799	$ 3,266	$ 5,766	$ 11,410
Cost of revenue (exclusive of depreciation and amortization)	1,228	1,612	3,767	5,684
Gross profit	571	1,654	1,999	5,726
Operating expenses:
Research and development	693	747	1,984	3,062
Sales and marketing	438	668	1,537	2,708
General and administrative	1,628	1,332	5,078	5,173
Impairment charges	254	117	302	667
Depreciation and amortization	669	780	2,098	2,392
Total operating expenses	3,682	3,644	10,999	14,002
Loss from operations	(3,111)	(1,990)	(9,000)	(8,276)
Interest and other expense, net	2	95	16	322
Other income	(3)	0	(227)	0
Gain on extinguishment of debt	(2,448)	0	(2,448)	0
Interest and other (income) expense, net	(2,449)	95	(2,659)	322
Loss before income taxes	(662)	(2,085)	(6,341)	(8,598)
Income tax expense	0	0	0	0
Net loss	(662)	(2,085)	(6,341)	(8,598)
Preferred stock dividends	0	4	1	12
Less: undeclared dividends	0	0	366	0
Induced conversion of Series A-2 Preferred Stock	0	0	300	0
Net loss attributable to common stockholders	(662)	(2,089)	(7,008)	(8,610)
Net loss attributable to common stockholders	$ (662)	$ (2,089)	$ (7,008)	$ (8,610)
Net loss attributable to common stockholders per share:
Basic net loss per share (in dollars per share)	$ (0.02)	$ (0.40)	$ (0.28)	$ (1.64)
Diluted net loss per share (in dollars per share)	$ (0.02)	$ (0.40)	$ (0.28)	$ (1.64)
Weighted-average number of shares of common stock:
Basic (in shares)	30,739,000	5,257,000	25,121,000	5,237,000
Diluted (in shares)	30,739,000	5,257,000	25,121,000	5,237,000