Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2026	Dec. 31, 2025
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	25,000,000	25,000,000
Common stock, issued (in shares)	4,756,734	4,756,734
Common stock, outstanding (in shares)	4,642,887	4,642,523
Treasury stock, shares (in shares)	113,847	115,211