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Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
$ / shares in Thousands
Mar. 31, 2020
Dec. 31, 2019
Common shares, authorized (in shares) 35,000,000 35,000,000
Common shares, outstanding (in shares) 26,091,492 26,067,502
Treasury shares (in shares) 957,304 981,294
Common shares, par value (in dollars per share) $ 0 $ 0