Note 6 - Loss Per Share - Reconciliation of the Components of Basic and Diluted Net Loss Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net loss	$ (1,885,730)	$ (808,344)	$ (4,771,130)	$ (1,476,980)
Weighted average shares outstanding, basic (in shares)	6,260,796	5,650,321	6,209,042	5,289,934
Net loss attributable to common stock, basic, loss per share (in dollars per share)	$ (0.30)	$ (0.14)	$ (0.77)	$ (0.28)
Weighted average shares outstanding, diluted (in shares)	6,260,796	5,650,321	6,209,042	5,289,934
Net loss attributable to common stock, diluted, loss per share (in dollars per share)	$ (0.30)	$ (0.14)	$ (0.77)	$ (0.28)