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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)
$ in Thousands
 3 Months Ended
Sep. 30, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Accounts receivable, allowance for doubtful accounts | $ $ 3 $ 3
Inventory, allowance for excess and obsolete inventory and lower of cost or estimated net realizable value adjustments | $ $ 126 $ 264
Preferred stock par value (in dollars per share) | $ / shares $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 1  
Preferred stock, shares outstanding (in shares) 0 1
Preferred Stock, Shares Issued (in shares) 1  
Preferred Stock, Shares Outstanding (in shares) 0 1
Common stock, par value (in dollars per share) | $ / shares $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 150,000,000 150,000,000
Common stock, shares outstanding (in shares) 4,885,000 321,000
Common stock, shares issued (in shares) 4,885,000 321,000
Reverse Stock Split [Member]    
Stockholders' Equity Note, Stock Split, Conversion Ratio 35  
Series B Preferred Stock [Member]    
Preferred stock, shares issued (in shares) 1,000 6,000
Preferred stock, shares outstanding (in shares) 1,000 6,000
Preferred Stock, Shares Issued (in shares) 1,000 6,000
Preferred Stock, Shares Outstanding (in shares) 1,000 6,000