Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2026	Dec. 31, 2025
Common stock, par value (in dollars per share)	$ 0.1	$ 0.1
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common stock, shares issued (in shares)	9,105,622	9,105,622
Common stock, shares outstanding (in shares)	9,046,799	9,045,851
Treasury stock, shares (in shares)	58,823	59,771