Mineral Properties - Awak Mas (Details) - PT Masmindo Dwi Area - Awak Mas $ in Thousands			1 Months Ended
	May 05, 2020 USD ($)	Nov. 01, 2019 USD ($) oz	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	May 04, 2020 USD ($)
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds	$ 2,400
Disposal Group, Deferred Gain on Disposal				$ 68	$ 168
Gain (Loss) On Disposal Of Mineral Property Interests, Net	$ 2,568
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%
Net Smelter Return Royalty Agreement Benchmark \| oz		1,250,000
NSR Royalty Cancelled Percentage	1.00%
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%
Net Smelter Return Royalty Agreement Benchmark \| oz		1,250,000
NSR Royalty Cancelled Percentage	1.25%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-30 \| First 1,250,000 Ounces Produced
Property, Plant and Equipment [Line Items]
NSR Cancellation Receivable		$ 2,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-30
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds	$ 2,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-31 \| Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
NSR Cancellation Proceeds			$ 2,500