Note 3 - Business Combinations - Intangible Assets Acquired (Details) - USD ($) $ in Millions	Feb. 03, 2020	Jan. 24, 2020
Parcus Medical [Member]
Intangible assets		$ 44.0
Arthrosurface [Member]
Intangible assets	$ 48.9
Developed Technology Rights [Member] | Parcus Medical [Member]
Intangible assets		41.1
Developed Technology Rights [Member] | Arthrosurface [Member]
Intangible assets	37.0
Trade Names [Member] | Parcus Medical [Member]
Intangible assets		1.8
Trade Names [Member] | Arthrosurface [Member]
Intangible assets	3.4
Customer Relationships [Member] | Parcus Medical [Member]
Intangible assets		$ 1.1
Customer Relationships [Member] | Arthrosurface [Member]
Intangible assets	7.9
In Process Research and Development [Member] | Arthrosurface [Member]
Intangible assets	$ 0.6