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Note 16 - Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  September 30, 2020 
  Fair Value Measurement Using  Assets (Liabilities) 
  Level 1  Level 2  Level 3  at Fair value 
                 
Derivative instrument asset $-  $2,402  $-  $2,402 
                 
Derivative instrument liability $-  $(247) $-  $(247)
                 
Total assets (liability) $-  $2,155  $-  $2,155 
  December 31, 2019 
  Fair Value Measurement Using  Assets (Liabilities) 
  Level 1  Level 2  Level 3  at Fair value 
                 
Derivative instrument asset $-  $731  $-  $731 
                 
Total assets $-  $731  $-  $731