Note 4 - Investment in the Joint Venture Company - Roll-forward of Investment in the Joint Venture Company (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Investment balance
Investment in Peak Gold, LLC			3,300,000	$ 3,210,000
Loss from equity investment in Peak Gold, LLC	$ (600,000)	$ (420,000)	(3,300,000)	(3,210,000)
Investment balance
The Joint Venture Company [Member]
Investment balance			0	$ 0	0	$ 0	$ 0	$ 0	$ 0
Investment in Peak Gold, LLC			3,300,000		4,140,000	2,580,000		0	1,433,886
Loss from equity investment in Peak Gold, LLC			(3,300,000)		(4,140,000)	(2,580,000)			(1,433,886)
Investment balance	$ 0		$ 0		$ 0	$ 0	$ 0	$ 0	$ 0