Note 2 - Liquidity and Capital Resources (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Net Income (Loss) Attributable to Parent, Total	$ (4,073,307)	$ (1,874,382)
Net Cash Provided by (Used in) Operating Activities, Total	(2,148,956)	(2,386,882)
Cash and Cash Equivalents, at Carrying Value, Ending Balance	19,568,247	$ 4,779,519	$ 10,380,493
Working Capital	$ 19,300,000