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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies  
Schedule of the Company's contractual obligations and commitments relating to its facilities leases
     
Operating Lease 
Obligation
 
2018
      $ 348    
2019
        344    
2020
        344    
2021
        344    
2022
        343    
thereafter
        956    
Total future minimum lease obligations
      $ 2,679