Note 2 - Significant Accounting Policies - Estimated Useful Lives of Property and Equipment (Details)	Dec. 31, 2023
Computer Equipment and Software [Member]
Property, plant and equipment useful life (Year)	3 years
Laboratory and Manufacturing Equipment [Member]
Property, plant and equipment useful life (Year)	3 years
Furniture and Fixtures [Member]
Property, plant and equipment useful life (Year)	3 years
Leasehold Improvements [Member]
Property, plant and equipment useful life (Year)	5 years