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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies [Abstract]  
Schedule of future minimum lease payments under leases
Year ending December 31,   Lease Obligations  
2018   $ 587  
2019     499  
2020     398  
2021     61  
Total future minimum obligations   $ 1,545