Note 5 - Stockholders' Deficit - Summary of Stock Purchase Warrants Outstanding By Expiry Date (Details) - $ / shares		12 Months Ended
		Jun. 30, 2023		Jun. 30, 2022
Warrant One [Member]
Class of warrant or right, expiry date		Nov. 16, 2022
Balance, exercise price (in dollars per share)		$ 0.05
Balance, number of warrant (in shares)	[1]	0		4,000,000
Stock Purchase Warrant [Member]
Balance, exercise price (in dollars per share)				$ 0.05
Balance, number of warrant (in shares)		0	[2]	4,000,000

[1] The exercise price of the warrants issued on November 16, 2017 is the lower of $0.05 and the lowest trade price in the 10 days previous to exercise.

[2] On November 16, 2022, these warrants expired unexercised.