Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 3,317	$ 6,518
Short-term investments	5,184	5,124
Accounts receivable and other receivables, net of allowance for doubtful accounts of $0 as of March 31, 2024 and December 31, 2023	760	514
Inventories - current	1,831	1,958
Assets held for sale	15	51
Prepaid expenses and other current assets	535	807
Total current assets	11,642	14,972
Property and equipment, net	328	384
Right of use asset	695	792
Inventories - noncurrent	3,178	3,354
Intangible assets, net	39	39
Other noncurrent assets	164	164
Total assets	16,046	19,705
Current liabilities:
Accounts payable and accrued expenses	1,732	2,410
Operating lease liability — current	801	852
Total current liabilities	2,878	3,590
Operating lease liability — noncurrent	21	155
Common stock warrant and option liabilities	664	1,257
Other noncurrent liabilities	2,000	2,000
Total liabilities	5,563	7,002
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, $0.001 par value - 150,000,000 shares authorized as of March 31, 2024 and December 31, 2023; 1,362,840 and 1,285,337 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	65	65
Additional paid-in capital	284,658	284,515
Accumulated other comprehensive income	161	101
Accumulated deficit	(274,263)	(271,840)
Total stockholders' equity	10,621	12,841
Non-controlling interest	(138)	(138)
Total stockholders' equity	10,483	12,703
Total liabilities and stockholders’ equity	16,046	19,705
Related Party [Member]
Current liabilities:
Other current liabilities	75	58
Nonrelated Party [Member]
Current liabilities:
Other current liabilities	$ 270	$ 270