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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities:    
Net loss for the period $ (8,184) $ (1,160)
Adjustments to reconcile net income/(loss) for the period to net cash used in operations:    
Depreciation and amortization 455 431
Stock-based compensation 680 476
Gain on disposal of mineral property (358) (150)
(Gain)/loss on other investments 858 (3,586)
Change in working capital account items:    
Other current assets 104 65
Accounts payable, accrued liabilities and other 378 (200)
Net cash used in operating activities (6,067) (4,124)
Cash flows from investing activities:    
Disposition of short-term investments, net of acquisitions 5,317  
Disposition of short-term investments, net of acquisitions   (11,486)
Additions to plant and equipment   (35)
Proceeds from option/sales agreements, net 358 150
Net cash provided by/(used in) investing activities 5,675 (11,371)
Cash flows from financing activities:    
Proceeds from equity financings, net   15,883
Payment of taxes from withheld shares (264)  
Proceeds from exercise of stock options   15
Net cash provided by/(used in) financing activities (264) 15,898
Net increase/(decrease) in cash and cash equivalents (656) 403
Cash and cash equivalents, beginning of period 1,904 902
Cash and cash equivalents, end of period $ 1,248 $ 1,305