Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Common stock, par value (in dollars per share)	$ 0.2	$ 0.2
Common stock, shares authorized (in shares)	4,000,000	4,000,000
Common stock, shares issued (in shares)	2,629,052	2,629,052
Common stock, shares outstanding (in shares)	2,531,175	2,514,775
Treasury stock, shares (in shares)	71,125	87,525