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



 

 

 



 

 

 

2018

 

$

965 

2019

 

 

927 

2020

 

 

737 

2021

 

 

413 

2022

 

 

306 

2023 and thereafter

 

 

 —

Total

 

$

3,348