Note 10 - Subsequent Events (Details Textual) - USD ($)	1 Months Ended	6 Months Ended
	Feb. 06, 2019	Dec. 31, 2018
Stock Issued During Period, Value, Issued for Services		$ 13,904
Sale of Units, Value		$ 477,365
Subsequent Event [Member]
Stock Issued During Period, Shares, Issued for Services	2,918
Stock Issued During Period, Value, Issued for Services	$ 2,000
Sale of Units, Number Of Units Issued	400,000
Shares Issued, Price Per Share	$ 0.50
Sale of Units, Value	$ 200,000
Number of Shares Per Unit	1
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.75
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right	0.5