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Note 15 - Business Acquisition - Identifiable Intangible Assets Acquired (Details) - USD ($)
$ in Thousands
Jul. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Goodwill   $ 164,774 $ 159,791
Asset Purchase Agreement [Member]      
Goodwill $ 4,983    
Intangible assets, net 9,683    
Asset Purchase Agreement [Member] | Trade Name and Trademarks [Member]      
Intangible assets, net $ 300    
Intangible assets, Weighted Average Amortization Period (Year) 4 years    
Asset Purchase Agreement [Member] | Developed Technology Rights [Member]      
Intangible assets, net $ 2,100    
Intangible assets, Weighted Average Amortization Period (Year) 4 years    
Asset Purchase Agreement [Member] | Customer Relationships [Member]      
Intangible assets, net $ 2,300    
Intangible assets, Weighted Average Amortization Period (Year) 6 years