CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 1,918	$ 5,328
Cost of revenue (exclusive of depreciation and amortization)	1,290	2,374
Gross profit	628	2,954
Operating expenses:
Research and development	692	1,327
Sales and marketing	527	1,220
General and administrative	2,067	2,028
Impairment charges	31	541
Depreciation and amortization	722	815
Total operating expenses	4,039	5,931
Loss from operations	(3,411)	(2,977)
Interest and other expense, net	5	154
Foreign exchange loss (gain)	17	(2)
Interest and other expense, net	22	152
Loss before income taxes	(3,433)	(3,129)
Income tax expense	0	0
Net loss	(3,433)	(3,129)
Preferred stock dividends	1	4
Undeclared dividends	366	0
Induced conversion of Series A-2 Preferred Stock	300	0
Net loss attributable to common stockholders	$ (4,100)	$ (3,133)
Net loss attributable to common stockholders per share:
Basic and diluted net loss per share (in dollars per share)	$ (0.23)	$ (0.60)
Weighted-average number of shares of common stock:
Basic and diluted (in shares)	17,756	5,204