Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
Income tax (benefit) provision $ (622,738) $ 581,887  
Effective tax rate 24.50% 25.10%  
Gross unrecognized tax benefits 4,900,000   4,900,000
Unrecognized tax benefits, if recognized would affect effective income tax rate $ 3,400,000   $ 3,400,000