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Nature of Operations and Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2017
Midas Gold Shares [Member]
Property, Plant and Equipment [Line Items]
Holding percentage	4.30%
Mt Todd, Australia [Member]
Property, Plant and Equipment [Line Items]
Percentage of ownership in project	100.00%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the cost method of accounting.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Represents the percentage of ownership by the entity in the project.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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