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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies  
Total minimum lease payments

Total minimum lease payments under these leases as of December 31, 2017 are summarized below (in thousands):

 

 

 

 

 

 

    

Lease Payments

 

2018

 

$

185

 

2019

 

 

176

 

2020

 

 

164

 

2021

 

 

12

 

2022

 

 

12

 

 

 

$

549