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Note 17 - Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
    June 30, 2020  
    Fair Value Measurement Using     Assets (Liabilities)  
    Level 1     Level 2     Level 3     at Fair value  
                                 
Derivative instrument asset   $ -     $ 1,691     $ -     $ 1,691  
                                 
Derivative instrument liability   $ -     $ (719 )   $ -     $ (719 )
                                 
Total assets (liability)   $ -     $ 972     $ -     $ 972  
    December 31, 2019  
    Fair Value Measurement Using     Assets (Liabilities)  
    Level 1     Level 2     Level 3     at Fair value  
                                 
Derivative instrument liability   $ -     $ 731     $ -     $ 731  
                                 
Total liabilities   $ -     $ 731     $ -     $ 731