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Note 15 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
     
(in thousands)
 
         
2017
  $
5,912
 
2018
   
431
 
2019
   
67
 
2020
   
36
 
2021 and thereafter
   
6
 
         
Total
  $
6,452