Note 3 - Summary of Significant Accounting Policies - Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2022
Equipment [Member]
Property, plant and equipment, useful life (Year)	5 years
Furniture and Fixtures [Member]
Property, plant and equipment, useful life (Year)	7 years
Software and Software Development Costs [Member]
Property, plant and equipment, useful life (Year)	5 years
Leasehold Improvements [Member]
Property, plant and equipment, estimated useful life	Lesser of estimated useful life or lease term