Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities – Note 8	$ 1,050	$ 0
Contract liabilities - Assets held for sale	6,574	0
Equipment not in use
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities – Note 8	1,050	$ 0
SAG Mill And Ball Mill
Long-Lived Assets Held-for-sale [Line Items]
Contract liabilities - Assets held for sale	1,100
Non refundable option payments amount due	$ 12,600