Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2025	Dec. 31, 2024
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	9,042,392
Common stock, shares outstanding (in shares)	9,045,851	8,979,091
Treasury stock, shares (in shares)	59,771	63,301