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Note 14 - Treasury Stock (Details Textual) - USD ($)
$ in Millions
Jul. 26, 2022
Jul. 31, 2023
Dec. 07, 2022
Oct. 04, 2021
Stock Repurchase Program, Authorized Amount     $ 1.0 $ 3.0
Stock Repurchase Program, Authorized Repurchase Amount Used   $ 0.3    
Treasury Stock, Shares, Retired (in shares) 239,168