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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
us-gaap_AssetsAbstract    
Cash and cash equivalents $ 751 $ 2,924
Accounts receivable, net of allowance for credit losses ($3 at June 30, 2024 and December 31, 2023) 547 680
Inventory, net of allowance for excess and obsolete inventory and lower of cost or estimated net realizable value adjustments ($204 and $264 at June 30, 2024 and December 31, 2023, respectively) 700 564
Prepaid expenses and other current assets 255 256
Current assets, discontinued operations 0 2,730
Total current assets 2,253 7,154
Operating lease right-of-use assets 1,128 1,296
Property and equipment, net 68 87
Other assets 476 478
Other assets, discontinued operations 0 19
TOTAL ASSETS 3,925 9,034
us-gaap_LiabilitiesAndStockholdersEquityAbstract    
Accounts payable 1,235 906
Accrued liabilities 1,297 1,169
Secured Convertible Notes, net of discounts 655 1,137
Unsecured Convertible Notes, net of discounts 41 0
Operating lease liabilities 382 368
Current liabilities, discontinued operations 0 698
Total current liabilities 3,610 4,278
Warrant liabilities 0 334
Operating lease liabilities-non-current 932 1,108
Total liabilities 4,542 5,720
Commitments and Contingencies  
Stockholders’ (deficit) equity:    
Common stock, $0.01 par value; 150,000 shares authorized, 1,348 and 321 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively [1] 13 3
Additional paid-in capital [1] 179,392 176,210
Accumulated deficit (180,028) (174,849)
Total stockholders’ equity (617) 3,314
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY 3,925 9,034
Series B Preferred Stock [Member]    
Stockholders’ (deficit) equity:    
Preferred Stock 6 275
Series C Preferred Stock [Member]    
Stockholders’ (deficit) equity:    
Preferred Stock $ 0 $ 1,675
[1] After giving retroactive effect to a 1-for-35 reverse stock split that became effective May 30, 2024.