XML 56 R115.htm IDEA: XBRL DOCUMENT v3.20.1
Share-based Compensation - Share option activities (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Number of Options        
Number of Options, Outstanding, Beginning Balance 34,251,734 39,288,939 44,445,135  
Number of Options, Granted 15,794,018 3,719,500 7,255,000  
Number of Options, Forfeited and expired (7,128,379) (3,933,599) (7,319,500)  
Number of Options, Exercised (174,373) (4,823,106) (5,091,696)  
Number of Options, Outstanding, Ending Balance 42,743,000 34,251,734 39,288,939 44,445,135
Number of Options, Exercisable 25,806,736      
Number of Options, Vested and expected to vest 33,809,645      
Weighted Average Exercise Price        
Weighted Average Exercise Price, Outstanding, Beginning Balance $ 0.47 $ 0.42 $ 0.43  
Weighted Average Exercise Price, Granted 0.48 0.56 0.42  
Weighted Average Exercise Price, Forfeited and expired 0.49 0.47 0.50  
Weighted Average Exercise Price, Exercised 0.43 0.12 0.37  
Weighted Average Exercise Price, Outstanding, Ending Balance 0.47 $ 0.47 $ 0.42 $ 0.43
Weighted Average Exercise Price, Exercisable 0.47      
Weighted Average Exercise Price, Vested and expected to vest $ 0.47      
Weighted Average Remaining Contractual Life        
Weighted Average Remaining Contractual Life, Outstanding 6 years 4 months 24 days 6 years 4 months 24 days 6 years 8 months 12 days 7 years 1 month 6 days
Weighted Average Remaining Contractual Life, Exercisable 4 years 6 months      
Weighted Average Remaining Contractual Life, Vested and expected to vest 5 years 7 months 6 days      
Aggregate Intrinsic Value        
Aggregate Intrinsic Value, Outstanding, Beginning Balance   $ 15,300 $ 1,800  
Aggregate Intrinsic Value, Exercised $ 20 $ 2,300 2,100  
Aggregate Intrinsic Value, Outstanding, Ending Balance     $ 15,300 $ 1,800