CONSOLIDATED STATEMENTS OF CASH FLOWS AND SUPPLEMENTAL CASH FLOW INFORMATION (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net loss	$ (6,588,479)	$ (8,670,147)
Reconciliation of net loss to cash used in operations:
Accretion/amortization of asset retirement obligations	101,617	194,870
Amortization of debt discount	647,629
Unrealized gain - derivative liability	(1,459,647)
Decrease in restoration and reclamation accrual	(146,723)	(933,897)
Depreciation	177,706	232,960
Impairment of uranium properties		679,655
Stock compensation expense	463,274	183,316
Other non-cash items, net	23,846	73,795
Effect of changes in operating working capital items:
Decrease in receivables	19,185	270,876
(Increase)/decrease in prepaid and other current assets	(49,754)	35,773
Decrease in payables, accrued liabilities and deferred credits	28,698	(291,301)
Net cash used in operating activities	(6,782,648)	(8,224,100)
Cash flows from investing activities:
Additions to restricted cash		5,481,573
Additions to/(reductions in) uranium properties		(115,244)
Purchases of equipment	(4,150)
Net cash provided by/( used in) investing activities	(4,150)	5,366,329
Cash flows from financing activities:
Proceeds from convertible loan	5,000,000
Payments on borrowings	(6,388)	(80,444)
Issuance of common stock, net	11,183,071	3,599,432
Payment of minimum withholding taxes on net share settlements of equity awards	(87,220)
Net cash provided by financing activities	16,089,463	3,518,988
Net increase in cash and cash equivalents	9,302,665	661,217
Cash and cash equivalents, beginning of period	1,117,303	4,664,596
Cash and cash equivalents, end of period	10,419,968	5,325,813
Cash paid during the period for:
Interest	5,751	2,970
Non-cash transactions:
Common stock issued for payment of convertible loan fees and interest	501,250
Common stock issued for repayment of short-term loan principal and interest		5,095,833
Common stock issued under stock-based compensation plans	191,730
Common stock issued for the settlement of litigation	333,847
Common stock issued for services		291,500
Restricted stock issued for services		$ 47