|
Year Ended December 31, | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
|
2013(2) | 2012(1) | 2011 | |||||||
Fair value of underlying instrument |
n/a | $ | 9.24 | $ | 6.76 | |||||
Expected volatility |
n/a | 69.1 | % | 66.0 | % | |||||
Expected term (in years) |
n/a | 0.16 | 1.16 | |||||||
Risk-free interest rate |
n/a | 0.04 | % | 0.12 | % | |||||
Expected dividend yield |
n/a | — | % | — | % |
|
Year Ended December 31, | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
|
2013(1) | 2012 | 2011 | |||||||
Fair value of underlying instrument |
$ | 20.03 | $ | 9.96 | $ | 7.56 | ||||
Expected volatility |
71.2 | % | 69.1 | % | 66.0 | % | ||||
Expected term (in years) |
0.24 | 0.97 | 1.98 | |||||||
Risk-free interest rate |
0.04 | % | 0.16 | % | 0.25 | % | ||||
Expected dividend yield |
— | % | — | % | — | % |
|
Year Ended December 31, | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
|
2013(1) | 2012 | 2011 | |||||||
Fair value of underlying instrument |
$ | 20.03 | $ | 11.04 | $ | 8.84 | ||||
Expected volatility |
71.2 | % | 69.1 | % | 66.0 | % | ||||
Expected term (in years) |
5.73 | 6.46 | 7.46 | |||||||
Risk-free interest rate |
1.75 | % | 0.95 | % | 1.35 | % | ||||
Expected dividend yield |
— | % | — | % | — | % |
|
Year Ended December 31, | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
|
2013(1) | 2012 | 2011 | |||||||
Fair value of underlying instrument |
$ | 20.03 | $ | 10.52 | $ | 8.84 | ||||
Expected volatility |
71.2 | % | 69.1 | % | 66.0 | % | ||||
Expected term (in years) |
6.48 | 7.22 | 8.22 | |||||||
Risk-free interest rate |
1.75 | % | 1.18 | % | 1.62 | % | ||||
Expected dividend yield |
— | % | — | % | — | % |