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Leases (Details) (USD $)
12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jan. 31, 2013
Subsequent Event
Operating Leased Assets [Line Items]        
Rent expense, operating leases $ 1,181,000 $ 824,000    
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]        
2013 1,067,871      
2014 537,501      
2015 547,967      
2016 45,749      
2017 0      
Thereafter 2,199,088      
Contract Termination Fee       615,000
Decrease in rent expense 135,273      
Term of operating sublease     2 years  
Future minimum sublease due $ 193,200