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Redeemable Convertible Preferred Stock and Stockholders' Deficit (Details 5) (Stock options, USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
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| Intrinsic-value | ||||
| Options Exercised | $ 1,130 | |||
| Options Outstanding | 55,147 | 55,147 | ||
| Options Exercisable | $ 38,783 | $ 38,783 | ||
| Assumptions used to estimate fair value of stock options | ||||
| Expected volatility (as a percent) | 57.00% | 61.00% | ||
| Expected volatility, minimum (as a percent) | 56.00% | 61.00% | ||
| Expected volatility, maximum (as a percent) | 59.00% | 63.00% | ||
| Expected dividends (as a percent) | 0.00% | 0.00% | 0.00% | 0.00% |
| Risk-free rate (as a percent) | 0.80% | |||
| Risk-free rate, minimum (as a percent) | 1.50% | 0.80% | 0.80% | |
| Risk-free rate, maximum (as a percent) | 1.70% | 1.70% | 0.90% | |
| Forfeiture rate (as a percent) | 7.20% | 7.90% | 7.20% | 7.90% |
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Minimum
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| Assumptions used to estimate fair value of stock options | ||||
| Expected term | 5 years 6 months | 6 years | 3 years 3 months 18 days | 5 years 6 months |
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Maximum
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| Assumptions used to estimate fair value of stock options | ||||
| Expected term | 6 years 1 month 6 days | 6 years 1 month 6 days | 7 years 2 months 12 days | 6 years 1 month 6 days |