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Note 2 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Property, Plant, and Equipment, Useful Life [Table Text Block]

Category

Estimated useful life

  

Office equipment

5 years

Laboratory equipment

3-8 years

Motor vehicles

10 years

Leasehold improvements

Lower of lease term or economic life