CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss for the period	$ (8,714)	$ (12,035)
Adjustments to reconcile net loss for the period to net cash used in operations:
Depreciation and amortization	983	655
Stock-based compensation	982	874
Gain on disposal of mineral property		(358)
Write-down of plant and equipment	1,000
(Gain)/loss on other investments	(1,716)	1,248
Change in working capital account items:
Other current assets	84	(160)
Provision for environmental liability		(108)
Accounts payable, accrued liabilities and other	(1,186)	1,083
Net cash used in operating activities	(8,567)	(8,801)
Cash flows from investing activities:
Proceeds from sales of marketable securities	170
Disposition of short-term investments, net of acquisitions	8,147	6,831
Additions to plant and equipment	(63)
Proceeds from option/sale agreements, net	50	1,761
Net cash provided by investing activities	8,304	8,592
Cash flows from financing activities:
Payment of taxes from withheld shares	(122)	(264)
Option Amendment	(61)
Proceeds from exercise of stock options	86
Net cash used in financing activities	(97)	(264)
Net decrease in cash and cash equivalents	(360)	(473)
Cash and cash equivalents, beginning of period	1,431	1,904
Cash and cash equivalents, end of period	$ 1,071	$ 1,431