CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 5,325,813	$ 4,664,596
Receivables, net	5,925	276,801
Prepaid and other current assets	395,654	431,427
Total current assets	5,727,392	5,372,824
Property, plant and equipment, at cost:
Uranium properties	108,232,478	107,672,404
Other property, plant and equipment	1,333,861	1,360,598
Less-accumulated depreciation, depletion and impairment	(65,466,430)	(65,318,921)
Net property, plant and equipment	44,099,909	43,714,081
Long-term investment:
Certificates of deposit, restricted	4,010,292	9,491,865
Total assets	53,837,593	58,578,770
Current liabilities:
Accounts payable	764,448	1,331,888
Note payable		5,000,000
Current portion of asset retirement obligations	887,257	1,160,378
Royalties and commissions payable	665,745	665,745
Accrued interest and other accrued liabilities	748,787	859,981
Current portion of capital leases	40,431	112,140
Total current liabilities	3,106,668	9,130,132
Asset retirement obligations	3,455,798	3,337,679
Other long-term deferred credits	500,000	500,000
Long-term capital leases, less current portion	8,847	17,582
Long-term debt	450,000	450,000
Total liabilities	7,521,313	13,435,393
Commitments and contingencies (Note 9)
Shareholders' equity:
Common stock, $.001 par value, shares authorized: 200,000,000; shares issued and outstanding (net of treasury shares): 2013-20,020,258; 2012-16,150,163	20,024	16,154
Paid-in capital	216,504,760	207,338,549
Accumulated deficit	(170,199,086)	(162,201,908)
Less: Treasury stock (3,813 shares), at cost	(9,418)	(9,418)
Total shareholders' equity	46,316,280	45,143,377
Total liabilities and shareholders' equity	$ 53,837,593	$ 58,578,770