Note 3 - Business Combination (Details Textual)	12 Months Ended
	Dec. 31, 2019
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	11 years 273 days
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	1 year 109 days
Developed Technology Rights [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	11 years 273 days
Developed Technology Rights [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	1 year 109 days