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Note 6 - Financial Instruments and Fair Value (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]
Description
 
Fair Value
Measurements
Using
Significant
Unobservable
Inputs
June 30, 201
8
 
Long-lived assets held for sale
  $
6,622