Contract Liabilities (Details) $ in Thousands		1 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) option_payment	Sep. 30, 2022 USD ($) option_payment	Aug. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) option_payment	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Note 8	$ 6,682	$ 6,682		$ 6,682		$ 0
Number of non-refundable option payments | option_payment	2	2		2
Contract liabilities - Assets held for sale				$ 1,375	$ 0
Proceeds from sale of equipment - Note 5				2,007	$ 0
Process equipment
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Note 8	$ 327	$ 327		327		0
Non refundable option payments amount due	100	100		100
Proceeds from sale of equipment - Note 5	300
Equipment not in use
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Note 8	6,355	6,355		6,355		$ 0
Ball mill
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Assets held for sale	5,400
Non refundable option payments amount due	900	900		900
SAG Mill And Ball Mill
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Assets held for sale	1,000	500	$ 500
Non refundable option payments amount due	$ 11,000	$ 11,000		$ 11,000