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Share-based compensation (Tables)
12 Months Ended
Dec. 31, 2017
Summary of Share Option Activity
The following table summarizes the share option activity for the years ended December 31, 2015, 2016 and 2017:
 
 
 
 
 
 
 
 
 
Weighted
 
 
 
 
 
 
 
 
 
Weighted-
 
average
 
 
 
 
 
 
 
Weighted
 
average
 
remaining
 
Aggregate
 
 
 
 
 
average
 
grant-date
 
contractual
 
intrinsic
 
 
 
Number of
 
exercise
 
fair
 
life
 
value (In
 
 
 
share options
 
price (USD)
 
value (USD)
 
(years)
 
thousands)
 
Outstanding, December 31, 2015
 
 
2,130,820
 
 
2.13
 
 
 
 
 
 
 
 
 
 
Vested and expected to vest at December 31, 2015
 
 
1,008,645
 
 
1.76
 
 
0.73
 
 
4.62
 
 
464
 
Exercisable at December 31, 2015
 
 
1,430,870
 
 
2.16
 
 
0.86
 
 
4.03
 
 
406
 
Forfeited
 
 
(14,375)
 
 
3.21
 
 
 
 
 
 
 
 
 
 
Expired
 
 
(182,510)
 
 
2.22
 
 
 
 
 
 
 
 
 
 
Exercised
 
 
(440,465)
 
 
1.81
 
 
 
 
 
 
 
 
 
 
Outstanding, December 31, 2016
 
 
1,493,470
 
 
2.65
 
 
 
 
 
3.39
 
 
6
 
Vested and expected to vest at December 31, 2016
 
 
1,440,923
 
 
2.67
 
 
0.85
 
 
3.24
 
 
6
 
Exercisable at December 31, 2016
 
 
1,217,050
 
 
2.70
 
 
0.84
 
 
3.20
 
 
6
 
Forfeited
 
 
(109,925)
 
 
2.89
 
 
 
 
 
 
 
 
 
 
Expired
 
 
(989,730)
 
 
2.28
 
 
 
 
 
 
 
 
 
 
Exercised
 
 
(4,000)
 
 
0.83
 
 
 
 
 
 
 
 
 
 
Outstanding, December 31, 2017
 
 
389,815
 
 
3.90
 
 
 
 
4.64
 
 
 
Vested and expected to vest at December 31, 2017
 
 
170,545
 
 
3.90
 
 
0.95
 
 
4.64
 
 
 
Exercisable at December 31, 2017
 
 
389,190
 
 
3.90
 
 
0.95
 
 
4.64
 
 
 
Schedule of Fair Values of Stock Options Granted
The fair values of stock options granted during the years ended December 31, 2016 and 2017 were estimated using the following assumptions:
 
Options granted to employees
 
Years ended December 31,
 
2016
 
2017
 
Risk-free interest rate(1)
 
 
0.77% to 1.76
%
 
0.77% to 1.76
%
Dividend yield(2)
 
 
 
 
 
Volatility rate(3)
 
 
40.07% to 43.3
%
 
40.07% to 43.3
%
Expected term (in years)(4)
 
 
4.06 to 5.56
 
 
4.06 to 5.56
 
 
(1)
The risk-free interest rate of periods within the contractual life of the share option is based on the USD denominated China Government Bond yield as at the valuation dates.
 
(2)
The Company has no history or expectation of paying dividends on its common shares.
 
(3)
Expected volatility is estimated based on the average of historical volatilities of the comparable companies in the same industry as at the valuation dates.
 
(4)
The expected term is developed by assuming the share options will be exercised in the middle point between the vesting dates and maturity dates.
Schedule of Recognized Compensation Costs
Total compensation costs recognized for the years ended December 31, 2015, 2016 and 2017 are as follows:
 
 
 
Years ended December 31,
 
(In thousands)
 
2015
 
2016
 
2017
 
Sales and marketing expenses
 
 
131
 
 
98
 
 
88
 
General and administrative expenses
 
 
6,701
 
 
6,267
 
 
5,800
 
Research and development expenses
 
 
2,896
 
 
2,983
 
 
2,442
 
Total
 
 
9,728
 
 
9,348
 
 
8,330
 
2013 Plan [Member]  
Summary of Restricted Shares Activities
A summary of the restricted shares activities under the 2010 Plan for the years ended December 31, 2017 is presented below:
 
 
 
Number of
restricted shares
 
Weighted-Average
Grant-Date Fair
Value
 
Unvested at January 1, 2016
 
 
432,217
 
 
 
 
Granted
 
 
1,170,000
 
 
1.18
 
Vested
 
 
(274,960)
 
 
 
 
Forfeited
 
 
(384,037)
 
 
 
 
Unvested at December 31, 2016
 
 
943,220
 
 
 
 
Vested and expected to vest at December 31, 2016
 
 
801,737
 
 
 
 
Granted
 
 
2,050,000
 
 
0.69
 
Vested
 
 
(115,125)
 
 
 
 
Forfeited
 
 
(1,605,945)
 
 
 
 
Unvested at December 31, 2017
 
 
1,272,150
 
 
 
 
Vested and expected to vest at December 31, 2017
 
 
1,081,327
 
 
 
 
2010 share incentive plan [Member]  
Summary of Restricted Shares Activities
A summary of the restricted shares activities under the 2013 Plan for the years ended December 31, 2015, 2016 and 2017 is presented below:
 
 
 
Number of
restricted shares
 
Unvested at January 1, 2015
 
 
7,200,778
 
Vested
 
 
(2,627,815)
 
Forfeited
 
 
(776,565)
 
Unvested at December 31, 2015
 
 
3,796,398
 
Vested and expected to vest at December 31, 2015
 
 
3,226,939
 
Unvested at January 1, 2016
 
 
3,796,398
 
Vested
 
 
(1,520,760)
 
Forfeited
 
 
(561,103)
 
Unvested at December 31, 2016
 
 
1,714,535
 
Vested and expected to vest at December 31, 2016
 
 
1,457,355
 
Unvested at January 1, 2017
 
 
1,714,535
 
Vested
 
 
(996,835)
 
Forfeited
 
 
(129,940)
 
Unvested at December 31, 2017
 
 
587,760
 
Vested and expected to vest at December 31, 2017
 
 
499,596
 
2014 Plan [Member]  
Summary of Restricted Shares Activities
A summary of the restricted shares activities under the 2014 Plan for the years ended December 31, 2016 and 2017 is presented below:
 
 
 
Number of
restricted
shares
 
Weighted-Average
Grant-Date Fair
Value
 
Unvested at January 1, 2016
 
 
5,761,400
 
 
 
 
Granted
 
 
6,749,000
 
 
1.12
 
Vested
 
 
(1,262,200)
 
 
 
 
Forfeited
 
 
(971,900)
 
 
 
 
Unvested at December 31, 2016
 
 
10,276,300
 
 
 
 
Vested and expected to vest at December 31, 2016
 
 
8,734,855
 
 
 
 
Unvested at January 1, 2017
 
 
10,276,300
 
 
 
 
Granted
 
 
 
 
 
 
Vested
 
 
(2,447,950)
 
 
 
 
Forfeited
 
 
(2,022,000)
 
 
 
 
Unvested at December 31, 2017
 
 
5,806,350
 
 
 
 
Vested and expected to vest at December 31, 2017
 
 
4,935,398