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Note 17 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
Contractual Obligations for the
year ending December 31,
 
Contractual
Lease Obligations
(1)
   
Purchase
Obligations
(2)
   
Total Obligations
 
2019
   
1,748
     
44,938
     
46,686
 
2020
   
1,084
     
5,068
     
6,152
 
2021
   
1,198
     
388
     
1,586
 
2022
   
1,182
     
379
     
1,561
 
2023
   
1,153
     
370
     
1,523
 
Thereafter
   
7,195
     
795
     
7,990
 
    $
13,560
    $
51,938
    $
65,498