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Operating Leases (Tables)
3 Months Ended
Mar. 31, 2018
Leases [Abstract]  
Summary of Total Lease and Operating Expenses
The following table summarizes the total lease and operating expenses for the three months ended March 31, 2018 and 2017:
 
 
March 31,
2018
 
March 31,
2017
Three Months Ended
$
256,290

 
$
231,463

Future Minimum Lease Payments under Operating Leases
The approximate future minimum lease payments under the operating lease are as follows:
 
Future Minimum Lease Payments
Nine Months 
 Remaining In
 
 
 
 
 
 
 
 
 
 
 
 
2018
 
2019
 
2020
 
2021
 
2022
 
Thereafter
 
Total
$
439,762

 
$
595,807

 
$
624,179

 
$
624,179

 
$
624,179

 
$
1,092,000

 
$
4,000,106