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Operating Leases (Tables)
6 Months Ended
Jun. 30, 2015
Leases [Abstract]  
Summary of Total Lease and Operating Expenses
The following table summarizes the total lease and operating expenses for the three and six months ended June 30, 2015 and 2014:
 
 
June 30,
2015
 
June 30,
2014
Three Months Ended
$
234,333

 
$
226,948

Six Months Ended
$
462,797

 
$
453,037

Future Minimum Lease Payments under Operating Leases
The approximate future minimum lease payments under the operating leases are as follows:
 
Future Minimum Lease Payments
Six Months 
 Remaining In
 
 
 
 
 
 
 
 
 
 
 
 
2015
 
2016
 
2017
 
2018
 
2019
 
Thereafter
 
Total
$
348,000

 
$
696,000

 
$
696,000

 
$
632,000

 
$
596,000

 
$
2,965,000

 
$
5,933,000