CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities:
Net loss	$ (7,267,149)	$ (5,719,174)
Reconciliation of net loss to cash used in by operations-
Accretion/amortization of asset retirement obligations	46,743	69,019
Depreciation and depletion	291,158	399,848
Impairment of uranium properties	751,772	588,098
Decrease in restoration and reclamation accrual	(879,269)	(752,961)
Stock compensation expense	311,797	579,502
Other non-cash items, net	609	2,288
Effect of changes in operating working capital items-
Increase in receivables	(83,354)	(90,134)
Increase in prepaid and other current assets	46,242	17,394
(Increase ) decrease in payables, accrued liabilities and deferred credits	1,672,138	(1,185,614)
Net cash used in operations	(5,109,313)	(6,091,734)
Investing activities:
Increase in certificates of deposit, restricted	(46,715)	(1,018,354)
Increase in notes receivable - Neutron credit and financing agreement (Note 10)	(3,156,765)
Additions to property, plant and equipment-
Proceeds from joint venture agreement		300,000
Net cash used in investing activities	(6,358,928)	(1,026,395)
Financing activities:
Payments on borrowings	(31,702)	(45,984)
Issuance of common stock, net	11,434,055	21,345
Net cash provided by (used in) financing activities	11,402,353	(24,639)
Net decrease in cash and cash equivalents	(65,888)	(7,142,768)
Cash and cash equivalents, beginning of period	2,890,263	15,386,472
Cash and cash equivalents, end of period	2,824,375	8,243,704
Non-cash transactions:
Issuance of common stock in settlement of deferred compensation		697,027
Issuance (forfeiture) of restricted stock to employees and directors	341	176
Capital lease obligations	24,931
Kingsville Dome
Reconciliation of net loss to cash used in by operations-
Impairment of uranium properties	321,000	362,000
Additions to property, plant and equipment-
Additions to property, plant and equipment	(537,187)	(73,913)
Vasquez
Reconciliation of net loss to cash used in by operations-
Impairment of uranium properties	401,000	135,000
Additions to property, plant and equipment-
Additions to property, plant and equipment	(10,045)	(15,100)
Rosita/Rosita South
Additions to property, plant and equipment-
Additions to property, plant and equipment	(29,943)	(92,080)
Los Finados
Additions to property, plant and equipment-
Additions to property, plant and equipment	(5,950)	(88,237)
Churchrock
Additions to property, plant and equipment-
Additions to property, plant and equipment	(2,016,662)	(9,899)
Crownpoint/Section 13
Additions to property, plant and equipment-
Additions to property, plant and equipment	(197,042)
Other property
Additions to property, plant and equipment-
Additions to property, plant and equipment	$ (358,619)	$ (28,812)