Note 5 - Goodwill and Other Intangible Assets (Details Textual)	9 Months Ended
	Sep. 30, 2021
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	16 years
Weighted Average [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	12 years 1 month 6 days