Mineral Properties - Capitalized Acquisition Costs on Mineral Properties (Details) - USD ($)	Sep. 30, 2018	Jun. 30, 2018
Mineral Properties [Line Items]
Mineral properties, net	$ 48,860,386	$ 48,860,386
Sleeper Gold Project
Mineral Properties [Line Items]
Mineral properties, net	25,674,658	25,674,658
Grassy Mountain Project
Mineral Properties [Line Items]
Mineral properties, net	$ 23,185,728	$ 23,185,728

Mineral properties, net of adjustments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=96866604&loc=d3e64895-109465

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant