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 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Feb. 27, 2015
Share-Based Payment Arrangement, Expense $ 133 $ 241 $ 305 $ 546  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 795   $ 795    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     2 years    
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