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Mineral Properties - Additional Information (Details)	Sep. 30, 2016 mi² a MiningClaim
Sleeper Gold Project | Nevada
Mineral Properties [Line Items]
Unpatented mining claims	2,322
Area covered by lode mining claims | mi²	72.5
Grassy Mountain Project | Oregon
Mineral Properties [Line Items]
Unpatented lode mining claims	418
Patented lode mining claims	3
Mill site mining claims	9
Association placer claims	6
Area covered by mining claims | a	9,300

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- Definition

Mineral properties.

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- Definition

Area covered under various mining claims that the Entity owns.

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- Definition

Number of association placer mining claims.

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- Definition

Number of mill site mining claims.

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- Definition

Number of patented lode mining claims.

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- Definition

Number of unpatented lode mining claims.

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- Definition

The number of mining claims that the company owns the right to that haven't been patented as of the balance sheet date.

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- Definition

Area covered under unpatented lode mining claims that the Entity owns.

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