Note 1 - Summary of Significant Accounting Policies - Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Revenue	$ 522,696	$ 329,930	$ 1,064,088	$ 1,100,108
Segment Loss	(4,008,512)	$ (2,506,869)	(5,836,592)	$ (6,640,301)
Net Assets	20,713,663		20,713,663		$ 53,472
Domestic [Member]
Revenue	455,878		934,621
Segment Loss	(838,742)		(2,697,338)
Net Assets	(284,805)		(284,805)		628,451
International [Member]
Revenue	40,006		77,051
Segment Loss	(92,398)		(289,492)
Net Assets	(10,387)		(10,387)		41,377
Other Segments [Member]
Revenue	26,812		52,416
Segment Loss	(3,077,372)		(2,849,762)
Net Assets	$ 21,008,855		$ 21,008,855		$ (616,356)