CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue	$ 3,810	$ 5,476
Cost of revenue (exclusive of depreciation and amortization and casualty loss)	2,899	3,930
Gross profit	911	1,546
Operating expenses (gains):
Research and development	20	1,699
Sales and marketing	309	1,431
General and administrative	4,870	5,278
Impairment charges	262	12,740
Casualty (gain) loss, net	(400)	483
Depreciation and amortization	345	1,903
Total operating expenses	5,406	23,534
Loss from operations	(4,495)	(21,988)
Interest and other income, net
Interest and other expense	28	19
Interest and other income	(166)	(59)
Total interest and other income, net	(138)	(40)
Loss before income taxes	(4,357)	(21,948)
Income tax expense (benefit)	27	(7)
Net income (loss)	(4,384)	(21,941)
Preferred stock dividends	343	0
Induced conversion of warrants	751	0
Warrant modification	25	0
Net loss attributable to common stockholders	$ (5,503)	$ (21,941)
Net loss attributable to common stockholders per share:
Basic net loss per share (in dollars per share)	$ (0.98)	$ (10.62)
Diluted net loss per share (in dollars per share)	$ (0.98)	$ (10.62)
Weighted-average number of shares of common stock:
Basic (in shares)	5,595	2,065
Diluted (in shares)	5,595	2,065