Condensed Consolidated Statements of Cash Flows and Supplemental Cash Flow Information (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net loss	$ (3,778)	$ (12,624)
Reconciliation of net loss to cash used in operations:
Accretion of asset retirement obligations	395	360
Amortization of debt discount	30	1,355
Amortization of convertible loan establishment fee		75
Amortization of notes receivable discount	(553)
Loss on extinguishment of convertible debt	39
Unrealized holding loss on securities		116
Common stock issued as payment for commitment fees		333
Costs incurred for restoration and reclamation activities	(37)	(54)
Depreciation and amortization	104	188
Stock compensation expense	62	545
Gain on disposal of uranium properties	(4,927)
Impairment of uranium properties		534
Amortization of non-cash investor relations fees	175
Effect of changes in operating working capital items:
(Increase)/decrease in receivables	(5)	47
(Increase)/decrease in prepaid and other current assets	(101)	101
Decrease in payables, accrued liabilities and deferred credits	(280)	(830)
Net Cash Used In Operating Activities	(8,876)	(9,854)
Cash Flows From Investing Activities:
Purchase of equipment	(100)
Proceeds from the sale of investments		247
Net decrease in restricted cash and short-term investments	23	57
Proceeds from disposal of property, plant and equipment	1,950
Net Cash Provided By Investing Activities	1,873	304
Cash Flows From Financing Activities:
Payments on borrowings	(5,500)
Issuance of common stock, net	16,395	12,511
Payment of minimum withholding taxes on net share settlements of equity awards	(1)
Net Cash Provided By Financing Activities	10,894	12,511
Net increase in cash and cash equivalents	3,891	2,961
Cash and cash equivalents, beginning of period	3,309	865
Cash and Cash Equivalents, End of Period	7,200	3,826
Cash paid during the period for:
Interest	227	486
Supplemental Non-Cash Information With Respect to Investing and Financing Activities:
Common stock issued for settlement of accounts payable	300	834
Common stock issued for payment of convertible loan interest and fees		242
Common stock issued for payment of commitment fees	$ 1,214	$ 523