|
Equity Compensation (Details) (Stock options, USD $)
|
3 Months Ended |
0 Months Ended |
|
|
Mar. 31, 2015
|
Jan. 01, 2015
|
Jun. 11, 2013
|
| Shares Subject to Options Outstanding |
|
|
|
| Balance at the beginning of the period (in shares) |
4,851,221 |
4,851,221 |
|
| Granted (in shares) |
41,000 |
|
|
| Exercised (in shares) |
(96,990) |
|
|
| Expired (in shares) |
(5,074) |
|
|
| Forfeited (in shares) |
(14,081) |
|
|
| Balance at the end of the period (in shares) |
4,776,076 |
|
|
| Exercisable options (in shares) |
2,721,289 |
|
|
| Vested and expected to vest at the end of the period (in shares) |
4,596,162 |
|
|
| Weighted Average Grant Date Fair Value |
|
|
|
| Granted (in dollars per share) |
$ 6.87 |
|
|
| Weighted Average Exercise Price |
|
|
|
| Balance at the beginning of the period (in dollars per share) |
$ 10.57 |
10.57 |
|
| Granted (in dollars per share) |
$ 13.14 |
|
|
| Exercised (in dollars per share) |
$ 5.05 |
|
|
| Expired (in dollars per share) |
$ 11.41 |
|
|
| Forfeited (in dollars per share) |
$ 12.35 |
|
|
| Balance at the end of the period (in dollars per share) |
$ 10.70 |
|
|
| Exercisable options at the end of the period (in dollars per share) |
$ 7.49 |
|
|
| Vested and expected to vest (in dollars per share) |
$ 10.50 |
|
|
| Weighted-Average Remaining Contractual Life |
|
|
|
| Exercisable options |
5 years 8 months 12 days |
|
|
| Vested and expected to vest |
6 years 10 months 24 days |
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|
|
2013 Plan
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|
|
|
| Stock options |
|
|
|
| Annual increase in shares authorized for issuance as a percentage of shares outstanding as of the preceding December 31 |
|
|
5.00% |
| Increase in number of shares authorized for issuance |
|
1,215,269 |
|