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Note 6 - Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

December 31, 2020

 
  

Fair Value Measurement Using

  

Assets (Liabilities)

 
  

Level 1

  

Level 2

  

Level 3

  

at Fair value

 
                 

Derivative instrument asset, net

 $-  $3,647  $-  $3,647 
                 

Total Assets, net

 $-  $3,647  $-  $3,647 
  

December 31, 2019

 
  

Fair Value Measurement Using

  

Assets (Liabilities)

 
  Level 1  

Level 2

  

Level 3

  

at Fair value

 
                 
Derivative instrument asset, net $-  $731  $-  $731 
                 
Total Assets, net $-  $731  $-  $731