v3.26.1
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 10, 2026
Apr. 17, 2017
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)         $ 3.41  
Share-Based Payment Arrangement, Expense     $ 54 $ 158 $ 87 $ 181
Director [Member]            
Stock Issued During Period, Shares, Treasury Stock Reissued (in shares)         28,740 16,116
Share-Based Payment Arrangement, Expense         $ 200 $ 200
Restricted Stock [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) 4,552          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Granted in Period, Total Fair Value $ 100          
The 2017 Stock Incentive Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   370,000        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)     10,751   10,751  
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)   10 years        
The 2017 Stock Incentive Plan [Member] | Incentive Option [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)   5 years        
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option, Treasury Stock [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)         14,000 68,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)         $ 3.41 $ 5.51
The 2017 Stock Incentive Plan [Member] | Minimum [Member] | Share-Based Payment Arrangement, Option [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   2 years        
The 2017 Stock Incentive Plan [Member] | Maximum [Member] | Share-Based Payment Arrangement, Option [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   3 years