Note 7 - Stockholders' Equity - Allocation of Recognized Period Costs (Details) - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Employee Stock Option [Member]
Allocated Share-based Compensation Expense	$ 95,500	$ 2,300
General and Administrative Expense [Member]
Allocated Share-based Compensation Expense	399,043	6,433
Change in fair value from modification of warrant terms	118,233
General and Administrative Expense [Member] | Stock Bonus [Member]
Allocated Share-based Compensation Expense		4,133
General and Administrative Expense [Member] | Employee Stock Option [Member]
Allocated Share-based Compensation Expense	69,625	2,300
Change in fair value from modification of option terms	211,185
Research and Development Expense [Member]
Allocated Share-based Compensation Expense	81,783	7,027
Change in fair value from modification of warrant terms	44,793
Research and Development Expense [Member] | Stock Bonus [Member]
Allocated Share-based Compensation Expense		7,027
Research and Development Expense [Member] | Employee Stock Option [Member]
Allocated Share-based Compensation Expense	25,875
Change in fair value from modification of option terms	$ 11,115