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Note 15 - Employee Stock Purchase Plan (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Jun. 23, 2021
Stock Issued During Period, Value, Employee Stock Purchase Plan $ 205 $ 233              
Share Price (in dollars per share) $ 13.6 $ 10.3 $ 15.17 $ 26.26 $ 20.74 $ 7.63 $ 6.82 $ 10.73  
Share-based Compensation Arrangement by Share-based Payment Award, Discount Amount $ 31 $ 36              
Employee Stock Purchase Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)                 250,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) 11,780 27,162              
Stock Issued During Period, Value, Employee Stock Purchase Plan $ 174 $ 197              
Shares Issued, Price Per Share (in dollars per share) $ 11.56 $ 8.76 $ 12.89 $ 22.32 $ 17.63 $ 6.49 $ 5.8 $ 9.12  
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date 15.00% 15.00%              
Share-based Compensation Arrangement by Share-based Payment Award, Discount Amount $ 31 $ 36