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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
CURRENT ASSETS:    
Allowance for doubtful accounts $ 31 $ 56
STOCKHOLDERS' EQUITY:    
Common stock, par value (in dollars per share) $ 0.0024 $ 0.0024
Common stock, shares authorized (in shares) 25,000,000 25,000,000
Common stock, shares issued (in shares) 9,823,621 9,717,525
Common stock, shares outstanding (in shares) 8,399,245 8,293,150
Treasury stock, shares (in shares) 1,424,376 1,424,376