Note 5 - Investment in Peak Gold JV - Roll-forward of Investment in the Joint Venture Company (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Investment balance			$ 0
Investment in Peak Gold, LLC			14,400,000	$ 3,706,000
Loss from equity investment in Peak Gold, LLC	$ (5,090,000)	$ (1,518,000)	(14,400,000)	$ (3,706,000)
The Joint Venture Company [Member]
Investment balance			0		$ 0
Investment in Peak Gold, LLC			14,400,000		3,706,000
Loss from equity investment in Peak Gold, LLC			$ (14,400,000)		$ (3,706,000)