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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Sep. 30, 2024
Dec. 31, 2023
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 2,500,000 2,500,000
Preferred stock, issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 50,000,000 50,000,000
Common stock, issued (in shares) 5,848,499 5,727,310
Common stock, outstanding (in shares) 5,848,499 5,727,310