As of December 31, 2017 | As of December 31, 2016 | |||||||||||
Number of options | Weighted average exercise price | Number of options | Weighted average exercise price | |||||||||
Balance at the beginning of year | 2,658,595 | 22.21 | 1,933,239 | 15.40 | ||||||||
Options granted during the year | 85,000 | 39.69 | 1,003,250 | 31.89 | ||||||||
Forfeited during the year | (249,035 | ) | 30.08 | (33,979 | ) | 25.75 | ||||||
Exercised during the year | (338,709 | ) | 15.63 | (243,915 | ) | 7.64 | ||||||
Balance at end of year | 2,155,851 | 23.02 | 2,658,595 | 22.21 |
As of December 31, 2017 | ||||||||||
Number of RSUs vested | Grant price | |||||||||
Granted in 2017 | 37,546 | 34.96 | ||||||||
Granted in 2017 | 49,385 | 37.00 | ||||||||
Balance at end of the year | 86,931 |
Grant date | Grant price ($) | Number of Restricted Stock Units | Fair value at grant date ($) | Expense as of December 31, 2017 ($) | ||||||||
2017 | 34.96 | — | — | 1,476 | ||||||||
36.30 | 2,000 | 73 | 3 | |||||||||
37.00 | 143,188 | 5,298 | 2,766 | |||||||||
42.00 | 9,000 | 378 | 101 | |||||||||
43.42 | 8,000 | 347 | 34 | |||||||||
Subtotal | 162,188 | 6,096 | 4,380 | |||||||||
Non employees stock options | ||||||||||||
2017 | 37.44 | 2,671 | 100 | 63 | ||||||||
Subtotal | 2,671 | 100 | 63 | |||||||||
Total | 164,859 | 6,196 | 4,443 |
As of December 31, 2017 | As of December 31, 2016 | |||||||||||
Number of options exercised | Exercise price | Number of options exercised | Exercise price | |||||||||
Granted in 2006 | 4,600 | 0.95 | 3,196 | 0.95 | ||||||||
Granted in 2007 | — | 0.71 | 36,538 | 0.71 | ||||||||
Granted in 2007 | 800 | 1.40 | 6,321 | 1.40 | ||||||||
Granted in 2010 | 1,623 | 2.48 | 3,295 | 2.48 | ||||||||
Granted in 2010 | — | 2.93 | 1,402 | 2.93 | ||||||||
Granted in 2010 | 22,377 | 3.38 | 39,142 | 3.38 | ||||||||
Granted in 2011 | 26,194 | 2.71 | 60,000 | 2.71 | ||||||||
Granted in 2012 | 1,651 | 6.77 | 2,000 | 6.77 | ||||||||
Granted in 2012 | 3,991 | 7.04 | 13,191 | 7.04 | ||||||||
Granted in 2013 | 2,395 | 14.40 | — | 0.00 | ||||||||
Granted in 2014 | 149,337 | 10.00 | 42,645 | 10.00 | ||||||||
Granted in 2014 | 1,918 | 13.20 | 2,901 | 13.20 | ||||||||
Granted in 2015 | 90,787 | 28.31 | 30,465 | 28.31 | ||||||||
Granted in 2015 | 9,911 | 29.34 | 2,819 | 29.34 | ||||||||
Granted in 2016 | 18,750 | 29.01 | — | — | ||||||||
Granted in 2016 | 4,375 | 32.36 | — | — | ||||||||
Balance at end of the year | 338,709 | 243,915 |
As of December 31, 2017 | |||||||
Number of RSU | Weighted average grant price | ||||||
Balance at the beginning of year | — | — | |||||
RSU granted during the year | 254,328 | 37.07 | |||||
Forfeited during the year | (2,538 | ) | 36.59 | ||||
Issued during the year | (86,931 | ) | 36.11 | ||||
Balance at end of year | 164,859 | 37.58 |