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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Trade accounts receivable, less allowances $ 15 $ 20
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 876,447 876,447
Preferred stock, shares outstanding (in shares) 876,447 876,447
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock authorized (in shares) 50,000,000 50,000,000
Common stock, shares issued (in shares) 5,260,741 4,348,690
Common stock, shares outstanding (in shares) 5,260,741 4,348,690
Convertible Preferred Stock    
Preferred stock authorized (in shares) 3,300,000 3,300,000