Annual report pursuant to Section 13 and 15(d)

Note 9 - Stock-based Incentive Plans (Details Textual)

v3.25.0.1
Note 9 - Stock-based Incentive Plans (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2024
Feb. 07, 2023
Feb. 06, 2023
Mar. 15, 2021
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Restricted Stock [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     97,900     97,900  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     3 years        
Share-Based Payment Arrangement, Expense         $ 145,000 $ 161,000  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 132,000       $ 132,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         7 months 6 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)         29,946   31,914
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares) 28,676       28,676 62,320 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) 3,698         3,666  
Equity Incentive Plan 2016 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 2,500,000       2,500,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 1,129,047       1,129,047    
The Phantom Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)       10 years      
The Phantom Plan [Member] | Phantom Shares [Member] | Employees and Non-Employee Directors [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   212,937          
Share-Based Payment Arrangement, Expense         $ 475,000 $ 551,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Payment Per Share (in dollars per share)   $ 12          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)         186,320    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares) 0       0    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)         26,617    
The Phantom Plan [Member] | Phantom Shares [Member] | Employees and Non-Employee Directors [Member] | Vesting Increments [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   3 years