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Mineral Properties - Awak Mas (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
PT Masmindo Dwi Area | Awak Mas
Property, Plant and Equipment [Line Items]
Proceeds From Royalty Agreement	$ 100
PT Masmindo Dwi Area | Awak Mas | First 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Royalty Cancellation, Percentage	1.00%
Remaining NSR Royalty Cancellation, Percentage	1.00%
PT Masmindo Dwi Area | Awak Mas | Next 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Royalty Cancellation, Percentage	1.25%
Remaining NSR Royalty Cancellation, Percentage	1.25%
Midas Gold Shares [Member]
Property, Plant and Equipment [Line Items]
Shares owned		6,882,115	7,802,615
Nusantara Resources
Property, Plant and Equipment [Line Items]
Stock Received During Period, Shares, Consideration		666,667
Shares owned		1,333,334
Nusantara Resources | PT Masmindo Dwi Area | Awak Mas
Property, Plant and Equipment [Line Items]
Stock Received During Period, Shares, Consideration	666,667
Stock Received During Period, Value, Consideration	$ 136
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-20
Property, Plant and Equipment [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-20 | PT Masmindo Dwi Area | Awak Mas | First 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds	$ 2,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-30
Property, Plant and Equipment [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-30 | PT Masmindo Dwi Area | Awak Mas
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds	$ 2,500

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