Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
Note 8 - Stock-based Incentive Plans (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
May 14, 2021
Mar. 15, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Share-Based Payment Arrangement, Expense     $ 126,000 $ 195,000 $ 475,000 $ 588,000
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)     1,219,583   1,219,583  
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)   223,307        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)   3 months        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)     27,913 27,913 83,739 83,739
The Phantom Plan [Member] | Phantom Shares [Member] | Employees and Non-Employee Directors [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Payment Per Share (in dollars per share)   $ 12.00        
The Phantom Plan [Member] | Phantom Shares [Member] | NewNonEmployeeDirectorsMember            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 9,074          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) 9,074