Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Stock-based Incentive Plans (Details Textual)

v3.24.1.u1
Note 8 - Stock-based Incentive Plans (Details Textual) - USD ($)
3 Months Ended
Feb. 07, 2023
Mar. 15, 2021
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Restricted Stock [Member]          
Share-Based Payment Arrangement, Expense     $ 37,000 $ 46,000  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount     $ 257,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     1 year    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)     7,795    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)     54,525   62,320
Equity Incentive Plan 2016 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)     2,500,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     1,125,349    
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 Payment Arrangement, Expense       $ 127,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 212,937        
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)     106,468    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)     79,852    
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