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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |  |
Net loss | $ (152,325) | $ (59,747) | $ (44,870)
Adjustments to reconcile net loss from operating activities: |  |  |
Impairment of mineral property interests and plant and equipment (Note 9) | 83,805 |  |
Loss from investment in Minera Santa Cruz S.A., net of amortization (Note 10) | 1,517 | 8,754 | 11,865
Loss on disposal of fixed assets |  | 96 | 77
Depreciation and amortization | 23,090 | 25,543 | 16,425
Loss (gain) on investments (Note 6) | 619 | (5,259) | 3,324
Unrealized foreign exchange loss (gain) and adjustment to estimate (Note 13) | 278 | 919 | (1,903)
Income and mining tax (recovery) | (1,390) | (3,844) | (2,770)
Stock-based compensation | 612 | 694 | 269
Revision of estimates and accretion of asset retirement obligations (Note 13) | 1,788 | 3,531 | 3,464
Change in non-cash working capital items: |  |  |
Decrease (increase) in other assets related to operations | 12,696 | (17,484) | 20,896
Increase (decrease) in liabilities related to operations | 1,437 | 7,270 | (6,290)
Cash (used in) provided by operating activities | (27,873) | (39,527) | 487
Cash flows from investing activities: |  |  |
Additions to mineral property interests and plant and equipment | (13,373) | (29,707) | (81,321)
Proceeds from disposal of property and equipment |  |  | 84
Investment in marketable equity securities (Note 5) |  |  | (1,384)
Proceeds from sale of investments, net of investments (Note 6) | 1,266 | 6,769 | 2,895
Dividends received from Minera Santa Cruz S.A. (Note 10) | 340 | 8,877 | 10,385
Cash used in investing activities | (11,767) | (14,061) | (69,341)
Cash flows from financing activities: |  |  |
Proceeds from sale of units, net of issuance costs (Note 14) |  | 69,467 |
Sale of flow-through common shares, net of issuance costs (Note 14) | 19,644 |  | 14,095
Proceeds of loan from related party (Note 12 and Note 16) |  |  | 25,000
Proceeds of loan (Note 12) |  |  | 25,000
Debt issuance costs and lender fees (Note 12) |  |  | (908)
Proceeds of at-the-market share sale (Note 14) |  | 1,851 | 918
Proceeds of exercise of stock options | 138 | 544 | 192
Payment of finance lease obligations | (2,204) | (1,855) | (485)
Shareholders' distribution (Note 14) |  |  | (3,372)
Cash provided by financing activities | 17,578 | 70,007 | 60,440
Effect of exchange rate change on cash and cash equivalents |  | (408) | 1,750
(Decrease) increase in cash, cash equivalents and restricted cash | (22,062) | 16,011 | (6,664)
Cash, cash equivalents and restricted cash, beginning of year | 46,500 | 30,489 | 37,153
Cash, cash equivalents and restricted cash, end of year (Note 19) | 24,438 | 46,500 | 30,489
Supplemental disclosure of cash flow information: |  |  |
Interest paid | (5,131) | (5,218) | (1,923)
Interest received | $ 159 | $ 133 | $ 372

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