CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 2,049	$ 2,816	$ 3,967	$ 8,144
Cost of revenue (exclusive of depreciation and amortization)	1,249	1,683	2,539	4,072
Gross profit	800	1,133	1,428	4,072
Operating expenses:
Research and development	599	988	1,291	2,315
Sales and marketing	572	834	1,099	2,040
General and administrative	1,383	1,815	3,450	3,842
Impairment charges	17	0	48	550
Depreciation and amortization	707	796	1,429	1,612
Total operating expenses	3,278	4,433	7,317	10,359
Loss from operations	(2,478)	(3,300)	(5,889)	(6,287)
Interest and other expense, net	9	76	14	220
Other income	(227)	0	(227)	0
Foreign exchange loss (gain)	(14)	9	3	7
Interest and other (income) expense, net	(232)	85	(210)	227
Loss before income taxes	(2,246)	(3,385)	(5,679)	(6,514)
Income tax expense	0	0	0	0
Net loss	(2,246)	(3,385)	(5,679)	(6,514)
Preferred stock dividends	0	4	1	8
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	(2,246)	(3,389)	(6,346)	(6,522)
Net loss attributable to common stockholders	$ (2,246)	$ (3,389)	$ (6,346)	$ (6,522)
Net loss attributable to common stockholders per share:
Basic net loss per share (in dollars per share)	$ (0.08)	$ (0.65)	$ (0.29)	$ (1.25)
Diluted net loss per share (in dollars per share)	$ (0.08)	$ (0.65)	$ (0.29)	$ (1.25)
Weighted-average number of shares of common stock:
Basic (in shares)	26,644	5,240	22,250	5,222
Diluted (in shares)	26,644	5,240	22,250	5,222