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Income Taxes (Schedule of Income Tax Provision) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]      
Statutory federal tax benefit $ (1,604,648) $ (1,291,175) $ (11,848,754)
State income tax, net of federal benefit (19,918) (232,489) (1,284,265)
Other permanent differences 4,975 22,101 607,981
Foreign rate differential (80,292) (50,173) 2,492,478
Rate change 388,656      
Lobbying costs 122,204      
Write-off of expired/forfeited options and conversion of notes 193,605 391,826 3,071,189
Canada transfer pricing and expiring attributes    (8,965,832)   
Expiration (reversal of expiration) of net operating losses    (4,745,271) 5,053,927
Other 1,393,366 732,322 309,840
Subtotal 397,948 (14,138,691) (1,597,604)
Decrease (increase) in valuation allowance (202,451) 14,138,691 1,597,604
Income tax expense $ 195,497