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Consolidated statements of cash flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Operating activities |  |
Net loss for the year | $ (3,466) | $ (5,207)
Adjustments for the following non-cash items: |  |
Depletion and amortization | 6,709 | 7,388
Deferred income tax expense (recovery) | (588) | 210
Accretion and decommissioning costs | 185 | 152
Share-based payments | 1,930 | 1,237
Unrealized loss (gain) on long-term investments | 24 | (17)
Provision on other long-term liabilities | 185 | 143
Deferred costs on credit facilities | 173 | 1,178
Net charges on post-employment benefit obligations | 108 | 433
Loss on disposal of assets |  | 20
Loss on available-for-sale investment | 8 | 132
Write-down of equipment | 204 |
Total adjustments | 5,472 | 5,669
Changes in non-cash working capital items: |  |
Trade and other receivables | (2,629) | 542
Inventories | (2,748) | 2,172
Prepaid expenses | 336 | (648)
Trade and other payables | 1,147 | (2,348)
Net cash generated from operating activities | 1,578 | 5,387
Investing activities |  |
Expenditures on property, plant and equipment | (7,176) | (4,660)
Net development costs on San Rafael | (13,435) | (2,777)
Net development costs on EI Cajon | 1,054 | (535)
Purchase of San Felipe property option | (7,108) |
Net cash used in investing activities | (26,665) | (7,972)
Financing activities |  |
Sale of available-for-sale investment | 274 | 89
Financing from (repayments to ) credit facilities | (8,005) | 600
Financing from pre-payment facility | 15,000 |
Proceeds from private placement |  | 23,787
Proceeds from exercise of options and warrants | 3,225 | 2,010
Net cash generated from financing activities | 10,494 | 26,486
Effect of foreign exchange rate changes on cash | (137) | (1,165)
Increase (decrease) in cash and cash equivalents | (14,730) | 22,736
Cash and cash equivalents, beginning of year | 24,055 | 1,319
Cash and cash equivalents, end of year | 9,325 | 24,055
Interest paid during the year | $ 1,165 | $ 1,122

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