Note 10 - Investment in Peak Gold, LLC (Details Textual) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Aug. 01, 2015	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments	$ 28,064,405	$ 0	$ 0
The Joint Venture Company [Member]
Equity Method Investment, Aggregate Cost	74,900,000									$ 1,400,000
Equity Method Investment, Total Contributions	74,900,000
Loss from Equity Method Investments, Unrecorded	2,100,000	2,800,000	3,300,000
Equity Method Investment, Summarized Financial Information, Inception-to-date Cumulative Income (Loss)		44,800,000	42,000,000
Payments to Acquire Interest in Joint Venture			39,100,000
Equity Method Investments	$ 28,064,405	0	0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0		$ 0	$ 0
Suspended Losses		$ 0	$ 0