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Stock Plans (Details 2)
|
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
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Jun. 30, 2011
|
Jun. 30, 2012
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Jun. 30, 2011
|
|
| Weighted Average Assumptions for fair value of stock options granted to employees | ||||
| Dividend rate | 0.00% | 0.00% | 0.00% | 0.00% |
| Risk-free interest rate | 0.90% | 1.90% | 1.10% | 2.50% |
| Expected term (in years) | 5 years 9 months 18 days | 5 years 2 months 12 days | 6 years | 6 years 1 month 6 days |
| Expected volatility | 47.00% | 48.00% | 49.00% | 48.00% |
|
ESPP [Member]
|
||||
| Weighted Average Assumptions for fair value of stock options granted to employees | ||||
| Dividend rate | 0.00% | 0.00% | ||
| Risk-free interest rate | 0.20% | 0.20% | ||
| Expected term (in years) | 6 months | 6 months | ||
| Expected volatility | 38.00% | 38.00% | ||