Note 7 - Stockholders' Equity - Nonvested Share Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Nonvested (in shares)
Nonvested, weighted-average grant-date fair value (in dollars per share)
Granted, options (in shares)	655,000	2,647,500
Granted, weighted-average grant-date fair value (in dollars per share)	$ 0.36
Vested (in shares)	(655,000)
Vested, weighted-average grant-date fair value (in dollars per share)	$ 0.36
Nonvested (in shares)
Nonvested, weighted-average grant-date fair value (in dollars per share)