Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Life (Details)	Dec. 31, 2023
Office Equipment [Member] | Minimum [Member]
Property and Equipment (Year)	3 years
Office Equipment [Member] | Maximum [Member]
Property and Equipment (Year)	10 years
Leasehold Improvements [Member] | Minimum [Member]
Property and Equipment (Year)	1 year	[1]
Leasehold Improvements [Member] | Maximum [Member]
Property and Equipment (Year)	2 years	[1]
Manufacturing Tooling [Member] | Minimum [Member]
Property and Equipment (Year)	3 years
Manufacturing Tooling [Member] | Maximum [Member]
Property and Equipment (Year)	7 years
Laboratory Equipment [Member] | Minimum [Member]
Property and Equipment (Year)	4 years
Laboratory Equipment [Member] | Maximum [Member]
Property and Equipment (Year)	10 years
Demo Equipment [Member]
Property and Equipment (Year)	3 years

[1] Leasehold improvements are amortized over the shorter of the useful life or the remaining lease term.