Consolidated Balance Sheet (Unaudited) (Parentheticals) - $ / shares $ / shares in Thousands	Mar. 31, 2023	Dec. 31, 2022
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	9,924,245	9,916,466
Common stock, shares outstanding (in shares)	8,088,793	8,245,235
Treasury Stock, Common, Shares	1,835,452	1,671,231