Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
us-gaap_AssetsAbstract
Cash and cash equivalents	$ 776	$ 2,924
Accounts receivable, net of allowance for credit losses ($3 at September 30, 2024 and December 31, 2023)	704	680
Inventory, net of allowance for excess and obsolete inventory and lower of cost or estimated net realizable value adjustments ($126 and $264 at September 30, 2024 and December 31, 2023, respectively)	473	564
Prepaid expenses and other current assets	326	256
Current assets, discontinued operations	0	2,730
Total current assets	2,279	7,154
Operating lease right-of-use assets	1,042	1,296
Property and equipment, net	61	87
Other assets	495	478
Other assets, discontinued operations	0	19
TOTAL ASSETS	3,877	9,034
Accounts payable	396	906
Accrued liabilities	1,147	1,169
Secured Convertible Notes, net of discounts	0	1,137
Unsecured Convertible Notes, net of discounts	51	0
Operating lease liabilities	390	368
Current liabilities, discontinued operations	0	698
Total current liabilities	1,984	4,278
Warrant liabilities	0	334
Operating lease liabilities-non-current	821	1,108
Total liabilities	2,805	5,720
Commitments and Contingencies
Stockholders’ equity:
Common stock, $0.01 par value; 150,000 shares authorized, 4,885 and 321 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively*	49	3
Additional paid-in capital	183,262	176,210
Accumulated deficit	(182,245)	(174,849)
Total stockholders’ equity	1,072	3,314
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	3,877	9,034
Series B Preferred Stock [Member]
Stockholders’ equity:
Preferred Stock	6	275
Series C Preferred Stock [Member]
Stockholders’ equity:
Preferred Stock	$ 0	$ 1,675