Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net loss	$ (11,946,442)	$ (11,488,063)
Reconciliation of net loss to cash used in operations:
Accretion/amortization of asset retirement obligations	292,305	69,416
Depreciation and depletion	341,680	423,388
Impairment of uranium properties	1,449,235	1,048,400
Decrease in restoration and reclamation accrual	(1,269,663)	(1,299,806)
Stock compensation expense	299,286	373,838
Other non-cash items, net	73,875	73,932
Effect of changes in operating working capital items:
(Increase) decrease in receivables	258,532	(140,228)
Increase in prepaid and other current assets	(17,274)	(125,058)
Increase (decrease) in payables, accrued liabilities and deferred credits	(231,931)	668,089
Net cash used in operating activities	(10,750,397)	(10,396,092)
Cash flows from investing activities:
Decrease in certificates of deposit, restricted	5,481,015	167,855
Additions to uranium properties	(884,640)	(7,955,263)
Net cash provided by (used in) investing activities	4,596,375	(7,787,408)
Cash flows from financing activities:
Payments on borrowings	(103,173)	(56,775)
Issuance of common stock, net	3,599,432	19,328,360
Net cash provided by financing activities	3,496,259	19,271,585
Net increase (decrease) in cash and cash equivalents	(2,657,763)	1,088,085
Cash and cash equivalents, beginning of period	4,664,596	2,890,263
Cash and cash equivalents, end of period	2,006,833	3,978,348
Non-cash transactions:
Issuance of common stock for short-term loan principal and interest payments	5,095,833
Issuance of common stock for services	291,500
Issuance of restricted stock to employees and directors	327	391
Issuance of common stock to acquire Neutron Energy, Inc.		16,650,000
Capital lease obligations		$ 106,154