Stock Plans (Details 1)
|
3 Months Ended | 6 Months Ended | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
|||||||||||
Share-based Goods and Nonemployee Services Transaction [Line Items] | ||||||||||||||
Weighted-average risk-free interest rate | 1.70% | 1.00% | 2.00% | 0.80% | ||||||||||
Expected dividend payments | 0.00% | 0.00% | 0.00% | 0.00% | ||||||||||
Expected holding period (years) | 4 years 2 months 12 days | [1] | 3 years 10 months 24 days | [1] | 6 years 6 months | [1] | 4 years 2 months 12 days | [1] | ||||||
Weighted-average volatility factor | 1.67 | [2] | 1.56 | [2] | 1.66 | [2] | 1.70 | [2] | ||||||
Estimated forfeiture rates | 31.00% | [3] | 32.00% | [3] | 31.00% | [3] | 32.00% | [3] | ||||||
|