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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]  
Schedule Future Minimum Lease Payments Under Operating Leases

The future minimum lease payments required under operating leases in effect at December 31, 2017 were as follows:

 

Year ending:

 

 

 

 

2018

 

$

978,873

 

2019

 

 

825,193

 

2020

 

 

502,461

 

2021

 

 

134,529

 

2022

 

 

22,527

 

 

 

$

2,463,583