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Note 15 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Operating Leases of Lessee Disclosure [Table Text Block]
    Minimum Rental
    (In thousands)
Years ended December 31:        
2016   $ 4,516  
2017     4,383  
2018     4,448  
2019     5,332  
2020     5,357  
Thereafter     25,502  
Total minimum payments required   $ 49,538