Note 5 - Goodwill and Other Intangibles (Details Textual)	3 Months Ended
	Mar. 31, 2020
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)	10 years 73 days
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	16 years