Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

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Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Decrease in valuation allowance $ 3,350,905    
Operating loss carryforwards, exclusive of excess share-based compensation deductions 6,571,519    
Valuation allowance related to excess share-based compensation deductions 599,153    
Operating loss carryforwards, per tax return 7,170,672    
Operating loss carryforwards, tax effected 2,493,239    
Valuation allowance 9,835 3,360,740  
Uncertain state tax positions in other long term liabilities 1,432 1,432 942
Accrued interest on unrecognized tax benefits $ 55 $ 92