v3.26.1
Note 4 - Earnings Per Share and Share Repurchase Plan (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Apr. 27, 2021
Feb. 09, 2009
Earnings Per Share and Share Repurchase Plan [Line Items]          
Treasury stock, shares 208,686   208,686    
Board of Directors [Member]          
Earnings Per Share and Share Repurchase Plan [Line Items]          
Stock repurchase plan approved date Jan. 21, 2008        
Share Repurchase Program 1 [Member]          
Earnings Per Share and Share Repurchase Plan [Line Items]          
Treasury stock, shares, acquired 0 0      
Treasury stock, shares 102,000        
Treasury stock shares average price per share acquired $ 24.93        
Treasury stock, value $ 2,543,000        
Share Repurchase Program 1 [Member] | Maximum [Member]          
Earnings Per Share and Share Repurchase Plan [Line Items]          
Stock repurchase program, number of shares authorized to be repurchased       200,000 100,000
Employee Stock Option [Member]          
Earnings Per Share and Share Repurchase Plan [Line Items]          
Antidilutive securities excluded from computation of earnings per share, amount 124,215 93,574