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Note 3 - Intangible Assets, Net (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Amortization of Intangible Assets, Total $ 3,547 $ 3,125  
Finite-Lived Intangible Assets, Gross, Total 106,386   $ 105,721
Software Developed for Internal Use, Not Commenced Amortization [Member]      
Finite-Lived Intangible Assets, Gross, Total $ 119