Note 6 - Income Taxes - Changes in the Valuation Allowance (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019		Jun. 30, 2018
Balance, beginning of year	$ (2,710,628)	[1]	$ (444,409)
Decrease (Increase) in valuation allowance	328,541		(2,266,219)
Balance, end of year	$ (2,382,087)		$ (2,710,628)	[1]

[1] As adjusted for the retrospective adoption of ASC 606 and ASC 842