Commitments and Contingencies - Additional Information (Details)	3 Months Ended	9 Months Ended
	Mar. 31, 2021 USD ($) a MiningClaim	Mar. 31, 2021 USD ($) a MiningClaim
Commitments And Contingencies [Line Items]
Net rental expense		$ 41,951
Sleeper Gold Project
Commitments And Contingencies [Line Items]
Total consideration payable	$ 350,000	$ 350,000
Unpatented lode mining claims | MiningClaim	152	152
Rate of net smelter return	1.00%
Grassy Mountain Project
Commitments And Contingencies [Line Items]
Number of mining fields | MiningClaim		44
Area covered by mining claims | a	589	589
Annual lease payment, year one	$ 40,000	$ 40,000
Annual lease payment, year two	40,000	40,000
Annual lease payment, thereafter	$ 60,000	60,000
Option to purchase mining claims, price		$ 560,000
Term of the agreement	25 years	25 years
Grassy Mountain Project | Minimum
Commitments And Contingencies [Line Items]
Royalty rate	2.00%	2.00%
Grassy Mountain Project | Maximum
Commitments And Contingencies [Line Items]
Royalty rate	4.00%	4.00%
Frost Project | Nevada
Commitments And Contingencies [Line Items]
Total consideration payable	$ 250,000	$ 250,000
Number of mining fields | MiningClaim		40
Percentage of mining claim rights acquired		100.00%
Percentage of Net Smelter Royalty		2.00%
Rate of right to reduce net smelter royalty by parent		1.00%
Payment to reduce NSR by parent		$ 1,000,000
Total consideration paid		$ 15,000