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Note 9 - Other Liabilities (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Business Combination, Acquisition Related Costs       $ 298
Business Combination, Contingent Consideration, Liability, Total $ 0 $ 0   275
Contingent Consideration       $ 23
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability   $ (23) $ 0  
Other Income [Member]        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (23)