CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 1,333	$ 2,049	$ 2,865	$ 3,967
Cost of revenue (exclusive of depreciation and amortization and casualty loss)	926	1,249	1,959	2,539
Gross profit	407	800	906	1,428
Operating expenses:
Research and development	398	599	1,402	1,291
Sales and marketing	317	572	879	1,099
General and administrative	1,185	1,383	2,875	3,450
Impairment charges	6,408	17	7,546	48
Casualty loss	533	0	533	0
Depreciation and amortization	599	707	1,226	1,429
Total operating expenses	9,440	3,278	14,461	7,317
Loss from operations	(9,033)	(2,478)	(13,555)	(5,889)
Interest and other expense (income), net	0	(232)	6	(210)
Loss before income taxes	(9,033)	(2,246)	(13,561)	(5,679)
Income tax expense	0	0	11	0
Net loss	(9,033)	(2,246)	(13,572)	(5,679)
Preferred stock dividends	0	0	0	1
Undeclared dividends	0	0	0	366
Induced conversion of Series A-2 Preferred Stock	0	0	0	300
Net loss attributable to common stockholders	$ (9,033)	$ (2,246)	$ (13,572)	$ (6,346)
Net loss attributable to common stockholders per share:
Basic net loss per share (in dollars per share)	$ (0.29)	$ (0.08)	$ (0.44)	$ (0.29)
Diluted net loss per share (in dollars per share)	$ (0.29)	$ (0.08)	$ (0.44)	$ (0.29)
Weighted-average number of shares of common stock:
Basic (in shares)	30,816	26,644	30,816	22,250
Diluted (in shares)	30,816	26,644	30,816	22,250