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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Sep. 30, 2023
Dec. 31, 2022
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 115,000,000 115,000,000
Common Stock, Shares, Issued (in shares) 20,650,266 20,447,371
Common Stock, Shares, Outstanding (in shares) 20,650,266 20,447,371