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Commitments And Contingencies (Details) - Mt. Todd, Australia [Member] AUD in Thousands, $ in Thousands	1 Months Ended	9 Months Ended
	May. 31, 2015 USD ($)	Sep. 30, 2015 AUD
Contract dispute settlement	$ 295
Noncontrolling Interest, Ownership Percentage by Parent		90.00%
Percentage of participating interest in gold project by affiliate		10.00%
Percentage of royalty on gold		1.00%
Percentage of royalty on other metals		1.00%
Minimum payment per year | AUD		AUD 50

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

Cash payment to affiliate as percentage of value of annual gold production from current mining leases.

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- Definition

Settlement for contract that was under dispute

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Minimum payment per year

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- Definition

Percentage of participating interest in gold project by affiliate.

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- Definition

Percentage of royalty on other metals.

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