Redeemable convertible preferred shares (Tables)
12 Months Ended
Dec. 31, 2015
Subscription Rights [Member]  
Assumptions to Estimated Fair Value of Warrants
    March 5,
2014
    April 24,
2014
 
Spot price(1)     3.31 - 4.65       3.39 - 4.64  
Risk-free interest rate(2)     0.04 %     0.02 %
Volatility rate(3)     38.12 %     42.74 %
Dividend yield(4)            

 

(1)
Spot price – based on the fair value of 100 percent equity interest of the Company which is allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. The probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%.

 

(2) Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

 

(3) Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

 

(4) The Company has no history or expectation of paying dividends on its common shares.

 

Series E Preferred Shares [Member] | Convertible Redeemable Preferred Shares [Member]  
Summary of Redeemable Convertible Preferred Shares
(In thousands)   December 31,
2015
 
Beginning balance      
Addition     275,314  
Exercise of Series E subsequent sale rights     28,568  
BCF upon Series E     (53,486 )
Amortisation of BCF of Series E     4,139  
Accretion of Series E to convertible redeemable preferred shares redemption value     12,754  
Acceleration of amortization of BCF of Series E upon IPO     49,346  
Deemed dividend to preferred shareholders upon IPO     27,396  
Converted to common shares upon IPO     (344,031 )
Ending balance      
Series D Preferred Stock [Member] | Convertible Redeemable Preferred Shares [Member]  
Summary of Redeemable Convertible Preferred Shares
    Years ended
December
31,2013
    Years ended
December
31,2014
 
Beginning balance     35,990       40,290  
Deemed dividend to Series D shareholder from its modification           279  
Accretion of Series D to convertible redeemable preferred shares redemption value     4,300       1,870  
Repurchase of preferred shares           (15,003 )
Deemed dividend to preferred shareholders upon IPO           4,008  
Converted to common shares upon IPO           (31,444 )
Ending balance     40,290        
Series D Warrants [Member]  
Assumptions to Estimated Fair Value of Warrants
    December 31,
2013
    February 6,
2014
 
Spot price(1)     4.36       4.47  
Risk-free interest rate(2)     0.05 %     0 %*
Volatility rate(3)     30.33 %     0 %*
Dividend yield(4)            

 

*
Given that the maturity date of Series D warrant was February 6, 2014, the volatility rate and risk-free interest rate did not affect the valuation of the warrant on February 6, 2014.

 

(1)
Spot price – based on the fair value of 100 percent equity interest of the Company which was allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. For the valuation on March 5, 2014 and March 31, 2014, the probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%

 

(2)
Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

 

(3)
Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

 

(4)
The Company has no history or expectation of paying dividends on its common shares.

 

Series E Warrants [Member]  
Assumptions to Estimated Fair Value of Warrants

    March 5,
2014
 
Spot price(1)     3.31 - 4.65  
Risk-free interest rate(2)     0.04% - 0.12 %
Volatility rate(3)     38.39% - 38.81 %
Dividend yield(4)      

 

(1)
Spot price – based on the fair value of 100 percent equity interest of the Company which was allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. For the valuation on March 5, 2014 and March 31, 2014, the probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10%

 

(2)
Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

 

(3)
Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

 

(4)
The Company has no history or expectation of paying dividends on its common shares.

 

Series E Warrants [Member] | Convertible Redeemable Preferred Shares [Member]  
Assumptions to Estimated Fair Value of Warrants

 

    March 5,
2014
 
Spot price(1)     4.50 - 4.65  
Risk-free interest rate(2)     0.12 %
Volatility rate(3)     38.81 %
Dividend yield(4)      

 

(1)
Spot price – based on the fair value of 100 percent equity interest of the Company which is allocated to preferred shares and common shares of the Company as at the valuation date under different scenarios. For the valuation on March 5, 2014 and March 31, 2014, the probability of the occurrence of an IPO is assumed to be 80%, the probability of the occurrence of a liquidation event is assumed to be 10% and the probability of the occurrence of a redemption event is assumed to be 10% .

 

(2) Risk-free interest rate – based on the US Treasury Bond & Notes BFV curve from Bloomberg as at the valuation date.

 

(3) Volatility – based on the average historical volatility of the comparable companies from Bloomberg as at the valuation date.

 

(4) The Company has no history or expectation of paying dividends on its common shares.