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INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE - Summary of Operating Results from MSC (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Income tax recovery | $ (1,138) | $ (2,656) |
(Loss) income from investment in MSC, net of amortization | $ (212) | $ 190 |
Corporate Venture |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Ownership interest (as a percent) | 100.00% | 100.00% |
MSC |  |  |
INVESTMENT IN MINERA SANTA CRUZ S.A. ("MSC") - SAN JOSE MINE |  |  |
Net sales | $ 50,662 | $ 48,343 |
Production costs applicable to sales | (43,468) | (36,699) |
Net (loss) income | $ 878 | $ 4,381 |
Ownership interest (as a percent) | 49.00% | 49.00% |
Net income (loss) | $ 430 | $ 2,147 | $ (2,328)
Amortization of fair value increments | 2,115 | 2,069 | 9,632
Income tax recovery | 1,473 | 112 | $ 11,916
(Loss) income from investment in MSC, net of amortization | $ (212) | $ 190 |

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