Consolidated Balance Sheet (Parentheticals) - $ / shares $ / shares in Thousands	Dec. 31, 2023	Dec. 31, 2022
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	9,930,704	9,916,466
Common stock, shares outstanding (in shares)	8,095,252	8,245,235
Treasury stock, shares (in shares)	1,835,452	1,671,231