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Note 15 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Operating Leases of Lessee Disclosure [Table Text Block]
    Minimum Rental
    (In thousands)
Years ended December 31:        
2017   $
6,068
 
2018    
5,793
 
2019    
6,684
 
2020    
6,756
 
2021    
5,990
 
Thereafter    
26,711
 
Total minimum payments required   $
58,002