Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Common stock, par value (in dollars per share)	$ 0	$ 0	$ 0
Common stock, shares authorized (in shares)	25,000,000	25,000,000	25,000,000
Common stock, shares issued (in shares)	7,536,488	7,505,139	7,451,996
Common stock, shares outstanding (in shares)	7,536,488	7,505,139	7,451,996