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7. Leases (Tables)
6 Months Ended
Jun. 30, 2019
Leases [Abstract]  
Schedule of lease expense and sublease income
    Three months ended June 30, 2019     Six months ended June 30, 2019  
             
Operating lease expense   $ 143     $ 324  
Short term lease expense     12       53  
Variable lease expense     17       49  
Sub lease income     (51 )     (68 )
                 
Total lease cost   $ 121     $ 358  
Supplemental non-cash flow information related to right-of-use asset and lease liabilities
    Three months ended June 30, 2019     Six months ended June 30, 2019  
 Accretion of the lease liability   $ 36     $ 76  
                 
Amortization of right-of-use assets   $ 146     $ 287  

 

Weighted Average Remaining Lease Term Operating Leases   1.8 years  
Weighted Average Discount Rate Operating Leases     14.7%

 

Maturities of operating lease liabilities
Twelve months ended June 30,   Operating leases  
       
2020   $ 701  
2021     228  
2022     141  
Total lease payments   $ 1,070  
         
Less imputed interest     (126 )
         
Total operating lease liability   $ 944