CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 872	$ 1,185	$ 2,866	$ 4,050
Cost of revenue (exclusive of depreciation and amortization and casualty loss)	648	841	2,244	2,800
Gross profit	224	344	622	1,250
Operating expenses (gains):
Research and development	5	232	16	1,634
Sales and marketing	81	282	241	1,161
General and administrative	977	1,229	3,723	4,104
Impairment charges	0	5,169	2	12,715
Casualty loss (gain), net of insurance proceeds	0	0	(400)	533
Depreciation and amortization	86	592	259	1,818
Total operating expenses	1,149	7,504	3,841	21,965
Loss from operations	(925)	(7,160)	(3,219)	(20,715)
Interest and other expense, net	15	3	26	9
Other income	(45)	(8)	(120)	(8)
Interest and other (income) expense, net	(30)	(5)	(94)	1
Loss before income taxes	(895)	(7,155)	(3,125)	(20,716)
Income tax (benefit) expense	0	(3)	38	8
Net loss	(895)	(7,152)	(3,163)	(20,724)
Preferred stock dividends	133	0	282	0
Induced conversion of warrants	0	0	751	0
Warrant modification	0	0	25	0
Net loss attributable to common stockholders	$ (1,028)	$ (7,152)	$ (4,221)	$ (20,724)
Net loss attributable to common stockholders per share:
Basic net loss per share (in dollars per share)	$ (0.30)	$ (3.46)	$ (1.58)	$ (10.04)
Diluted net loss per share (in dollars per share)	$ (0.30)	$ (3.46)	$ (1.58)	$ (10.04)
Weighted-average number of shares of common stock:
Basic (in shares)	3,463	2,065	2,676	2,065
Diluted (in shares)	3,463	2,065	2,676	2,065