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Note 17 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Lessee, Operating Lease, Disclosure [Table Text Block]
2018
  $
1,465
 
2019
   
1,385
 
2020
   
1,317
 
2021
   
1,362
 
2022
   
1,378
 
2023 and thereafter
   
5,074
 
Total   $
11,981