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OPERATING SEGMENT REPORTING - Summary of Reportable Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Operating Segment Reporting |  |
Revenue from gold and silver sales | $ 25,542 | $ 23,740
Depreciation and depletion | (3,712) | (5,137)
Gross profit (loss) | (5,994) | (4,986)
Advanced projects | (11,135) | (1,799)
Loss from investment in Minera Santa Cruz S.A. | (1,120) | (574)
Loss before income and mining taxes | (21,878) | (14,481)
Capital expenditures | 4,057 | 10,324
United States Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Depreciation and depletion | (818) | (1,741)
Gross profit (loss) | (3,248) | (2,405)
Advanced projects | (45) | (84)
Segment loss | (4,742) | (3,353)
Capital expenditures | 277 | 757
Canada |  |
Operating Segment Reporting |  |
Depreciation and depletion | (2,894) | (3,395)
Gross profit (loss) | 1,355 | (1,490)
Advanced projects | (91) | (623)
Segment loss | (436) | (5,547)
Capital expenditures | 3,546 | 9,567
Mexico Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Depreciation and depletion |  | (1)
Gross profit (loss) | (4,101) | (1,091)
Advanced projects | (1,243) | (1,092)
Segment loss | (5,345) | (2,191)
MSC |  |
Operating Segment Reporting |  |
Loss from investment in Minera Santa Cruz S.A. | (1,120) | (574)
Segment loss | (1,120) | (574)
Los Azules |  |
Operating Segment Reporting |  |
Advanced projects | (9,756) |
Segment loss | (9,816) | (650)
Capital expenditures | 234 |
Total Segment |  |
Operating Segment Reporting |  |
Depreciation and depletion | (3,712) | (5,137)
Gross profit (loss) | (5,994) | (4,986)
Advanced projects | (11,135) | (1,799)
Loss from investment in Minera Santa Cruz S.A. | (1,120) | (574)
Segment loss | (21,459) | (12,315)
General and Administrative and other | (419) | (2,166)
Gold and silver sales |  |
Operating Segment Reporting |  |
Revenue from gold and silver sales | 25,542 | 23,740
Gold and silver sales | United States Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Revenue from gold and silver sales | 11,742 | 12,893
Gold and silver sales | Canada |  |
Operating Segment Reporting |  |
Revenue from gold and silver sales | 12,896 | 8,561
Gold and silver sales | Mexico Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Revenue from gold and silver sales | 904 | 2,286
Gold and silver sales | Total Segment |  |
Operating Segment Reporting |  |
Revenue from gold and silver sales | 25,542 | 23,740
Product [Member] |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (27,824) | (23,589)
Product [Member] | United States Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (14,172) | (13,557)
Product [Member] | Canada |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (8,647) | (6,656)
Product [Member] | Mexico Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (5,005) | (3,376)
Product [Member] | Total Segment |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (27,824) | (23,589)
Exploration | United States Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (1,449) | (864)
Exploration | Canada |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (1,700) | (3,434)
Exploration | Mexico Reportable Segment [Member] |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (1) | (8)
Exploration | Los Azules |  |
Operating Segment Reporting |  |
Production costs applicable to sales | (60) | (650)
Exploration | Total Segment |  |
Operating Segment Reporting |  |
Production costs applicable to sales | $ (3,210) | $ (4,956)

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