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Note 4 - Goodwill (Details Textual)
3 Months Ended
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Goodwill, Ending Balance $ 164,774,000 $ 164,774,000
Number of Reporting Units 2  
Goodwill, Impairment Loss $ 0  
Fluent [Member]    
Goodwill, Ending Balance $ 159,791  
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 18.00%  
Goodwill Impairment Test, Discount Rate 13.00%  
All Other Reporting Unit [Member]    
Goodwill, Ending Balance $ 4,983  
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 4.00%  
Goodwill Impairment Test, Discount Rate 16.50%