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REVENUE AND COST OF SALES (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of Revenue

		Three months ended September 30,								Nine months ended September 30,
		2021				2020				2021				2020
Concentrate sales		$	1,881			$	2,157			$	1,881			$	13,964
Provisional pricing adjustments			-				502				29				651
		$	1,881			$	2,659			$	1,910			$	14,615

Schedule of Cost of Sales

		Three months ended September 30,								Nine months ended September 30,
		2021				2020				2021				2020
Production costs		$	724			$	1,428			$	724			$	10,607
Stand-by and ramp-up costs			-				875				800				875
Depreciation and depletion			319				545				1,245				1,692
		$	1,043			$	2,848			$	2,769			$	13,174