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Consolidated Statements of Cash Flows
shares in Thousands
 9 Months Ended
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
USD ($)
shares
OPERATING ACTIVITIES    
Net loss $ (19,960,000) $ (27,551,000)
Items not involving cash:    
Depletion, depreciation and amortization 4,306,000 3,651,000
Stock-based compensation 2,617,000 1,688,000
Change in value of convertible debentures 615,000 666,000
Change in value of warrant liabilities (1,416,000) (1,879,000)
Accretion of asset retirement obligation 1,036,000 526,000
Revision of asset retirement obligation 0 71,000
Unrealized foreign exchange gains (486,000) (148,000)
Impairment of inventories 2,821,000 2,998,000
Abandonment of mineral properties 287,000 1,036,000
Impairment of mineral properties held for sale 3,799,000 0
Other non-cash expenses (income) 1,435,000 60,000
Changes in assets and liabilities    
Decrease in inventories 1,700,000 4,417,000
Decrease in trade and other receivables 36,000 2,221,000
Decrease in prepaid expenses and other assets 527,000 476,000
Decrease in accounts payable and accrued liabilities (2,191,000) (1,063,000)
Changes in deferred revenue 135,000 242,000
Cash paid for reclamation and remediation activities (732,000) (1,376,000)
Net cash (used in) provided by operating activities (5,471,000) (13,965,000)
INVESTING ACTIVITIES    
Purchase of plant and equipment 0 (64,000)
Acquisition Of Alta Mesa Net Of Cash Acquired 0 (1,290,000)
Acquisition Of Roca Honda Net Of Cash 0 101,000
Refunds And Returns For The Period 14,436,000 0
Posting of additional collateral (13,616,000) (4,115,000)
Sale of mineral properties held for sale 0 845,000
Net cash (used in) provided by investing activities 820,000 (4,523,000)
FINANCING ACTIVITIES    
Issuance of common shares for cash 9,799,000 25,291,000
Option and warrant exercises 0 18,000
Repayment of loans and borrowings (3,272,000) (2,391,000)
Proceeds from Noncontrolling Interests 365,000 37,000
Net cash (used in) provided by financing activities 6,892,000 22,955,000
CHANGE IN CASH AND CASH EQUIVALENTS DURING THE PERIOD 2,241,000 4,467,000
Effect of exchange rate fluctuations on cash held in foreign currencies 306,000 98,000
Cash and cash equivalents - beginning of period 16,901,000 12,965,000
CASH AND CASH EQUIVALENTS - END OF PERIOD $ 19,448,000 $ 17,530,000
Non-cash investing and financing transactions:    
Issuance of common shares for consulting services (in shares) | shares 370 479
Supplemental disclosure of cash flow information:    
Interest $ 1,230,000 $ 1,375,000
Alta Mesa    
Non-cash investing and financing transactions:    
Issuance of common shares for acquisition (in shares) | shares 0 11,378
Roca Honda    
Non-cash investing and financing transactions:    
Issuance of common shares for acquisition (in shares) | shares 0 2,679
Percentage of voting interests acquired   40.00%