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OPERATING SEGMENT REPORTING - Geographic information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 30, 2021 | Dec. 31, 2020 | Dec. 30, 2020 | Dec. 31, 2019 | Dec. 30, 2019
Operating Segment Reporting |  |  |  |  |  |
Long-lived Assets | $ 440,316 |  | $ 445,624 |  |  |
Revenue | 136,541 |  | 104,789 |  | $ 117,019 |
Investment in MSC | 90,961 |  | 108,326 |  |  |
Total which excludes Company's ROU office lease asset | 400 |  | 600 |  |  |
Minera Santa Cruz S.A. [Member] |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Investment in MSC | 90,961 |  | 108,326 |  | 110,183 |
Bank of Nova Scotia |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Revenue |  | $ 134,700 |  |  |  |
Bank of Nova Scotia | Customer |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Revenue |  |  | $ 33,000 | $ 67,000 | $ 103,600 | $ 4,900
Bank of Nova Scotia | Customer | Revenue Benchmark |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Gold and silver sales, percentage |  | 98.80% | 32.00% | 64.00% | 89.00% | 4.00%
UNITED STATES |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Long-lived Assets | 37,878 |  | $ 46,801 |  |  |
Revenue | 79,205 |  | 48,884 |  | $ 43,847 |
Canada |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Long-lived Assets | 93,294 |  | 78,986 |  |  |
Revenue | 50,704 |  | 41,452 |  | 50,058 |
MEXICO |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Long-lived Assets | 26,561 |  | 20,021 |  |  |
Revenue | 6,632 |  | 14,453 |  | $ 23,114 |
ARGENTINA |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Long-lived Assets | 282,583 |  | 299,816 |  |  |
ARGENTINA | Minera Santa Cruz S.A. [Member] |  |  |  |  |  |
Operating Segment Reporting |  |  |  |  |  |
Investment in MSC | $ 90,900 |  | $ 108,300 |  |  |

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