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Note 18 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   $ 
     

Year ending December 31, 2022

  666 

Year ending December 31, 2023

  702 

Year ending December 31, 2024

  308 

Year ending December 31, 2025

  314 

Year ending December 31, 2026

  318 

Total lease payments

  2,308 

Less: imputed interest

  (302

)

     

Present value of lease liabilities

  2,006 
Lease Agreement for Office and Laboratories [Member]  
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   $ 
     

Year ending December 31, 2022

  76 

Year ending December 31, 2023

  463 

Year ending December 31, 2024

  477 

Year ending December 31, 2025

  491 

Year ending December 31, 2026

  506 

Year ending December 31, 2027 and thereafter

  2,085 
     

Total payments

  4,098