Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock Based Compensation (Details Textual)

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Note 10 - Stock Based Compensation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Feb. 27, 2015
Share-Based Payment Arrangement, Expense $ 172 $ 307  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 835    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 8 months 12 days    
2015 Stock Option and Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)     250,000
2015 Stock Option and Incentive Plan [Member] | Restricted Stock [Member] | Minimum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years    
2015 Stock Option and Incentive Plan [Member] | Restricted Stock [Member] | Maximum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 5 years