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Operating Leases (Tables)
9 Months Ended
Sep. 30, 2013
Leases [Abstract]  
Summary of Total Lease and Operating Expenses

The following table summarizes the total lease and operating expenses for the three and nine months ended September 30, 2013 and 2012:

 

     2013      2012  

Three Months Ended

   $ 177,310       $ 174,278   

Nine Months Ended

     517,549         512,529   
Future Minimum Lease Payments under Operating Leases

The approximate future minimum lease payments under the operating leases are as follows:

 

Three Months

Remaining In

                         
2013     2014     2015     2016     Thereafter  
$ 114,000      $ 346,000      $ 141,000      $ 82,000      $ —