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13. Share-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Assumptions used
   December 31,
2018
  December 31,
2017
       
Dividend yield       N/A 
Risk-free interest rate   2.55%   N/A 
Expected term (in years)   3.69    N/A 
Volatility   26.6%   N/A