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COMMITMENTS AND CONTINGENCIES - Lease Obligations and Purchase Commitments (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Operating lease obligations (office rent) |
2019 | $ 374
2020 | 322
2021 | 263
2022 | 252
2023 | 256
Thereafter | 143
Total | 1,610
Operating lease obligations (mining and surface rights) |
2019 | 2,524
2020 | 453
2021 | 460
2022 | 460
2023 | 454
Total | 4,351
Exploration |
2019 | 15,115
Total | 15,115
Construction |
2019 | 6,044
Total | 6,044
Reclamation costs |
2019 | 726
2020 | 1,561
2021 | 2,890
2022 | 5,860
2023 | 141
Thereafter | 33,211
Total | 44,389
Total |
2019 | 29,658
2020 | 17,061
2021 | 45,606
2022 | 6,572
2023 | 851
Thereafter | 33,354
Total | 133,102
Long-term debt |
2019 | 4,875
2020 | 14,725
2021 | 41,993
Total | $ 61,593

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