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5. Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of minimum operating lease payments

Twelve months ended December 31,

  Future Rent Payments  
2019   $ 712  
2020     430  
2021     210  
2022     35  
Total   $ 1,387