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PLANT EQUIPMENT AND MINING PROPERTIES (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Statement [Line Items]    
Beginning Balance $ 80,323,000 $ 69,141,000
Additions/ Transfers 288,000 12,020,000
Writendowns (2,000) (798,000)
Effect Of Movements In Exchange Rates (20,000) (40,000)
Ending balance 80,589,000 80,323,000
Accumulated Depletion And Depreciation, Beginning Balance 27,254,000 25,085,000
Accumulated Depletion And Depreciation, Additions / Transfers 785,000 2,822,000
Accumulated Depletion And Depreciation, Ending Balance 28,039,000 27,254,000
Accumulated Depletion And Depreciation, Writedowns   (653,000)
Net book value 52,550,000 53,069,000
Office Equipment Furniture And Fixtures [Member]    
Statement [Line Items]    
Beginning Balance 844,000 763,000
Additions/ Transfers 6,000 78,000
Writendowns (1,000) (6,000)
Effect Of Movements In Exchange Rates (2,000) 9,000
Ending balance 847,000 844,000
Accumulated Depletion And Depreciation, Beginning Balance 548,000 441,000
Accumulated Depletion And Depreciation, Additions / Transfers 21,000 111,000
Accumulated Depletion And Depreciation, Ending Balance 569,000 548,000
Accumulated Depletion And Depreciation, Writedowns   (4,000)
Net book value 278,000 296,000
Mine Machinery And Transportation Equipment [Member]    
Statement [Line Items]    
Beginning Balance 17,573,000 14,930,000
Additions/ Transfers 138,000 3,270,000
Writendowns 0 (629,000)
Effect Of Movements In Exchange Rates (1,000) 2,000
Ending balance 17,710,000 17,573,000
Accumulated Depletion And Depreciation, Beginning Balance 5,235,000 5,178,000
Accumulated Depletion And Depreciation, Additions / Transfers 4,000 676,000
Accumulated Depletion And Depreciation, Ending Balance 5,239,000 5,235,000
Accumulated Depletion And Depreciation, Writedowns   (619,000)
Net book value 12,471,000 12,339,000
Mill Machinery And Processing Equipment [Member]    
Statement [Line Items]    
Beginning Balance 26,232,000 23,294,000
Additions/ Transfers 409,000 3,079,000
Writendowns 0 (141,000)
Effect Of Movements In Exchange Rates 0 0
Ending balance 26,641,000 26,232,000
Accumulated Depletion And Depreciation, Beginning Balance 7,894,000 6,733,000
Accumulated Depletion And Depreciation, Additions / Transfers 480,000 1,170,000
Accumulated Depletion And Depreciation, Ending Balance 8,374,000 7,894,000
Accumulated Depletion And Depreciation, Writedowns   (9,000)
Net book value 18,267,000 18,338,000
Mining Property [Member]    
Statement [Line Items]    
Beginning Balance 18,375,000 14,687,000
Additions/ Transfers 187,000 3,716,000
Writendowns 0 0
Effect Of Movements In Exchange Rates 3,000 (28,000)
Ending balance 18,565,000 18,375,000
Accumulated Depletion And Depreciation, Beginning Balance 9,473,000 9,106,000
Accumulated Depletion And Depreciation, Additions / Transfers 103,000 367,000
Accumulated Depletion And Depreciation, Ending Balance 9,576,000 9,473,000
Accumulated Depletion And Depreciation, Writedowns   0
Net book value 8,989,000 8,902,000
Computer equipment [member]    
Statement [Line Items]    
Beginning Balance 1,929,000 774,000
Additions/ Transfers 2,000 1,176,000
Writendowns (1,000) (22,000)
Effect Of Movements In Exchange Rates 1,000 1,000
Ending balance 1,931,000 1,929,000
Accumulated Depletion And Depreciation, Beginning Balance 781,000 598,000
Accumulated Depletion And Depreciation, Additions / Transfers 100,000 204,000
Accumulated Depletion And Depreciation, Ending Balance 881,000 781,000
Accumulated Depletion And Depreciation, Writedowns   (21,000)
Net book value 1,050,000 1,148,000
Buildings and construction in process [Member]    
Statement [Line Items]    
Beginning Balance 15,370,000 14,693,000
Additions/ Transfers (454,000) 701,000
Writendowns 0 0
Effect Of Movements In Exchange Rates (21,000) (24,000)
Ending balance 14,895,000 15,370,000
Accumulated Depletion And Depreciation, Beginning Balance 3,323,000 3,029,000
Accumulated Depletion And Depreciation, Additions / Transfers 77,000 294,000
Accumulated Depletion And Depreciation, Ending Balance 3,400,000 3,323,000
Accumulated Depletion And Depreciation, Writedowns   0
Net book value $ 11,495,000 $ 12,047,000