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Note 12 - Segment Information (Details Textual)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Number of Reportable Segments 2  
Revenue from Contract with Customer, Including Assessed Tax $ 230,517 $ 252,876
Intersegment Eliminations [Member]    
Revenue from Contract with Customer, Including Assessed Tax $ 0 $ 0