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Note 5 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]

Level 2

 

March 31, 2021

   

December 31, 2020

 

Liabilities:

               

Derivative financial instruments

  $ (385 )   $ (624 )