Note 3 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Impairment of Intangible Assets (Excluding Goodwill), Total	$ 0	$ 0
Operating Lease, Right-of-Use Asset	313,364
Operating Lease, Liability, Total	$ 313,364
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 300,000
Operating Lease, Liability, Total			$ 300,000