Note 8 - Stockholders' Equity - Allocation of Recognized Period Costs (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Option [Member]
Allocated Share-based Compensation Expense	$ 99,500	$ 22,500	$ 99,500	$ 118,000
General and Administrative Expense [Member]
Change in fair value from modification of warrant terms				118,233
Allocated Share-based Compensation Expense	92,000	22,500	92,000	421,543
General and Administrative Expense [Member] | Share-based Payment Arrangement, Option [Member]
Change in fair value from modification of option terms				211,185
Allocated Share-based Compensation Expense	92,000	22,500	92,000	92,125
Research and Development Expense [Member]
Change in fair value from modification of warrant terms				44,793
Allocated Share-based Compensation Expense	7,500		7,500	81,783
Research and Development Expense [Member] | Share-based Payment Arrangement, Option [Member]
Change in fair value from modification of option terms				11,115
Allocated Share-based Compensation Expense	$ 7,500		$ 7,500	$ 25,875