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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities:    
Net income/(loss) for the period $ (5,529) $ 923
Adjustments to reconcile net income/(loss) for the period to net cash used in operations:    
Depreciation and amortization 318 287
Stock-based compensation 427 308
Gain on disposal of mineral property (358) (150)
(Gain)/loss on other investments 780 (3,820)
Change in working capital account items:    
Other current assets 54 15
Accounts payable, accrued liabilities and other 269 (272)
Net cash used in operating activities (4,039) (2,709)
Cash flows from investing activities:    
Disposition of short-term investments, net of acquisitions 3,843 3,035
Additions to plant and equipment   (24)
Proceeds from option/sales agreements, net 358 150
Net cash provided by/(used) in investing activities 4,201 3,161
Net increase in cash and cash equivalents 162 452
Cash and cash equivalents, beginning of period 1,904 902
Cash and cash equivalents, end of period $ 2,066 $ 1,354