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Note 15 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Lessee, Operating Lease, Disclosure [Table Text Block]
    Minimum Rental
    (In thousands)
Years ended December 31:        
2019   $
7,605
 
2020    
7,977
 
2021    
7,214
 
2022    
6,822
 
2023    
6,961
 
Thereafter    
23,655
 
Total minimum payments required   $
60,234