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Note 18 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Hierarchy

  

June 30,

  

December 31,

 

Liabilities:

 

Level

  

2020

  

2019

 

Other liabilities, current

            

Accrued compensation for phantom shares

  3  $-  $1,590 

Other liabilities, non-current

            

Warrant liability - Note 12

  3  $18  $18