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Note 14 - Share-based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Feb. 07, 2021
Feb. 19, 2019
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)   0        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeiture Rate     25.00%      
Share-Based Payment Arrangement, Expense $ 1,563 $ 1,541        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,162          
Share-Based Payment Arrangement, Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) 10 years          
Share-Based Payment Arrangement, Option [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 1 year          
Share-Based Payment Arrangement, Option [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 5 years          
Restricted Stock Units (RSUs) [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 1 year          
Restricted Stock Units (RSUs) [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) 5 years          
The 2015 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) 3,200,000     3,200,000 2,200,000 1,100,000
Shares, Issued (in shares) 1,854,919          
Common Stock, Capital Shares Reserved for Future Issuance (in shares) 822,737          
Share-Based Payment Arrangement, Expense $ 619          
Deferred Compensation Liability, Current, Total $ 619          
The 2007 and 2012 Equity Incentive Plans [Member]            
Common Stock, Capital Shares Reserved for Future Issuance (in shares)   0