CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,350,219	$ 4,664,596
Receivables, net		276,801
Prepaid and other current assets	452,961	431,427
Total current assets	4,803,180	5,372,824
Property, plant and equipment, at cost:
Uranium properties	107,963,263	107,672,404
Other property, plant and equipment	1,365,055	1,360,598
Less-accumulated depreciation, depletion and impairment	(65,404,296)	(65,318,921)
Net property, plant and equipment	43,924,022	43,714,081
Long-term investment:
Certificates of deposit, restricted	9,497,497	9,491,865
Total assets	58,224,699	58,578,770
Current liabilities:
Accounts payable	1,134,536	1,331,888
Note payable		5,000,000
Current portion of asset retirement obligations	1,003,049	1,160,378
Royalties and commissions payable	665,745	665,745
Accrued interest and other accrued liabilities	746,474	859,981
Current portion of capital leases	78,980	112,140
Total current liabilities	3,628,784	9,130,132
Asset retirement obligations	3,375,957	3,337,679
Other long-term deferred credits	500,000	500,000
Long term capital leases, less current portion	10,972	17,582
Long-term debt, less current portion	450,000	450,000
Total liabilities	7,965,713	13,435,393
Commitments and contingencies (Note 10)
Shareholders' equity:
Common stock, $.001 par value, shares authorized: 200,000,000; shares issued and outstanding (net of treasury shares): 2013-19,821,681; 2012-16,150,163	19,825	16,154
Paid-in capital	216,601,079	207,338,549
Accumulated deficit	(166,352,500)	(162,201,908)
Less: Treasury stock (3,813 shares), at cost	(9,418)	(9,418)
Total shareholders' equity	50,258,986	45,143,377
Total liabilities and shareholders' equity	$ 58,224,699	$ 58,578,770