Condensed Consolidated Statements of Cash Flows and Supplemental Cash Flow Information (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities:
Net loss	$ (8,880)	$ (8,313)
Reconciliation of net loss to cash used in operations:
Accretion of asset retirement obligations	240	225
Amortization of debt discount	900	899
Amortization of convertible loan establishment fee	50	50
Loss on sale of marketable securities	116
Common stock issued as payment for commitment fees	333
Impairment of uranium properties	534
Costs incurred for restoration and reclamation activities	(49)	(88)
Depreciation and amortization	132	169
Stock based compensation expense	470	625
Gain on disposal of property, plant and equipment		(18)
Effect of changes in operating working capital items:
(Increase)/decrease in receivables	47	(2)
Decrease in prepaid and other current assets	130	50
Increase in payables, accrued liabilities and deferred credits	737	568
Net Cash Used In Operating Activities	(5,240)	(5,835)
Cash Flows From Investing Activities:
Proceeds from the sale of investments	247
Increase in notes receivable		(780)
Increase in restricted cash	(6)
Purchases of equipment		(12)
Proceeds from disposal of property, plant and equipment		18
Net Cash Provided By/(Used In) Investing Activities	241	(774)
Cash Flows From Financing Activities:
Payments on borrowings		(4)
Issuance of common stock, net	5,108	5,654
Payment of minimum withholding taxes on net share settlements of equity awards		(126)
Net Cash Provided By Financing Activities	5,108	5,524
Net increase/(decrease) in cash and cash equivalents	109	(1,085)
Cash and cash equivalents, beginning of period	865	5,570
Cash and Cash Equivalents, End of Period	974	4,485
Cash paid during the period for:
Interest	286
Supplemental Non-Cash Information With Respect to Investing and Financing Activities:
Common stock issued for settlement of accounts payable	778
Common stock issued for payment of convertible loan interest and fees	242	380
Common stock issued for payment of commitment fees	$ 523