XML 59 R131.htm IDEA: XBRL DOCUMENT v3.20.1
Share-based compensation (Share-based compensation-Share options-2011 Share Incentive Scheme) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Granted ,weighted average exercise price $ 1.7582 $ 2.6425  
2011 Incentive Scheme [Member]      
Balance ,options 10,934,300 0  
Granted ,options 438,100 10,934,300  
Forfeited ,Options (1,065,000)    
Balance ,options 10,307,400 10,934,300 0
Expected to vest at December 31, 2019 ,options 10,307,400    
Exercisable at December 31, 2019 ,options 2,134,100    
Granted ,weighted average exercise price $ 3.5350 $ 4.7025  
Forfeited ,weighted average exercise price 4.5225    
Balance ,weighted average exercise price 3.8069 $ 4.7025 $ 0
Expected to vest at December 31, 2019 ,weighted average exercise price 3.8069    
Exercisable at December 31, 2019 ,weighted average exercise price $ 4.7025    
Balance ,contractual life 5 years 5 months 12 days 5 years 3 months 14 days 0 years
Expected to vest at December 31, 2019 ,contractual life 5 years 5 months 12 days    
Exercisable at December 31, 2019 ,contractual life 6 years 6 months    
Balance, December 31, 2019 ,aggregate intrinsic value $ 0 $ 0 $ 0
Expected to vest at December 31, 2019 ,aggregate intrinsic value 0    
Exercisable at December 31, 2019 ,aggregate intrinsic value $ 0