Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Prepaid Expenses (Tables)

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Note 4 - Prepaid Expenses (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   

June 30,

   

December 31,

 
   

2021

   

2020

 
                 

Prepaid research and development expenses

  $ 1,052     $ 622  

Other prepaid expenses

    770       1,932  
    $ 1,822     $ 2,554