Commitments and contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Summary of Minimum Operating Lease Obligations for Its Premises Due in Future Fiscal Years

The following is a summary of the Company’s minimum operating lease obligations for its premises due in future fiscal years:

 

2018

   $ 81  

2019

     88  

2020

     92  

2021

     92  

2022

     95  

Thereafter

     8  
  

 

 

 
   $ 456