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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Dec. 31, 2022
Sep. 30, 2022
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 50,000,000 50,000,000
Common stock, shares issued (in shares) 10,417,609 10,417,609
Common stock, shares outstanding (in shares) 10,417,609 10,417,609
Series C Convertible Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 1,000  
Preferred stock, shares authorized (in shares) 11,000 11,000
Preferred stock, shares issued (in shares) 350 350
Preferred stock, shares outstanding (in shares) 350 350