|
Stockholders' Equity (Details 3)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Stockholders Equity [Line Items] | |||
| Annual dividend | 0.00% | 0.00% | 0.00% |
|
Minimum [Member]
|
|||
| Stockholders Equity [Line Items] | |||
| Expected life (in years) | 3 years | 2 years | 2 years |
| Risk free interest rate | 0.29% | 0.24% | 0.25% |
| Expected volatility | 65.10% | 55.50% | 66.90% |
|
Maximum [Member]
|
|||
| Stockholders Equity [Line Items] | |||
| Expected life (in years) | 6 years 6 months | 4 years | 3 years 6 months |
| Risk free interest rate | 2.43% | 0.65% | 1.39% |
| Expected volatility | 77.50% | 77.40% | 75.40% |