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Commitments (Tables)
6 Months Ended
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Operating Leases Obligations
Future minimum lease payments under these agreements are as follows (in thousands):

Year ending December 31:
 
2018
$
557

2019
206

2020
85

2021
44

2022
4

Thereafter

 
$
896