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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net income for the period $ 923 $ 2,642
Adjustments to reconcile net income/(loss) for the period to net cash provided by/(used in) operations    
Depreciation and amortization 287 368
Stock-based compensation 308 467
Gain on disposal of marketable securities   (12)
Gain on disposal of mineral property (150) (1,958)
(Gain)/loss on other investments (3,820) 1,050
Change in working capital account items:    
Other current assets 15 152
Accounts payable, accrued liabilities and other (272) (115)
Net cash provided by/(used in) operating activities (2,709) 2,594
Cash flows from investing activities:    
Proceeds from sales of marketable securities   41
Proceeds from sale of other investments, net   2,772
Disposition of short-term investments, net of acquisitions 3,035 (8,793)
Additions to plant and equipment (24) (10)
Proceeds from option/sales agreements, net 150 3,490
Net cash provided by/(used in) investing activities 3,161 (2,500)
Net increase in cash and cash equivalents 452 94
Cash and cash equivalents, beginning of period 902 3,714
Cash and cash equivalents, end of period $ 1,354 $ 3,808