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Operating Leases (Tables)
6 Months Ended
Jun. 30, 2012
Operating Leases [Abstract]  
Summary of lease and operating expense
                 
    2012     2011  

Three Months Ended

  $ 167,872     $ 140,796  

Six Months Ended

    338,251       287,021  
Future minimum lease payments under the operating leases
                                     
2012     2013     2014     2015     2016  
$ 224,000     $ 417,000     $ 397,000     $ 401,000     $ 234,000