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Balance Sheets (Parentheticals) - $ / shares
$ / shares in Thousands
Dec. 31, 2023
Dec. 31, 2022
Common Stock, Shares Authorized (in shares) 3,000,000 3,000,000
Common Stock, No Par Value (in dollars per share) $ 0 $ 0
Common Stock, Shares, Issued (in shares) 2,014,283 1,988,701
Common Stock, Shares, Outstanding, Ending Balance (in shares) 1,991,337 1,974,427
Treasury Stock, Common, Shares (in shares) 22,946 14,274