|
Summary of Significant Accounting Policies (Details 3)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2011
year
|
|
|
Minimum
|
|
| Operating lease | |
| Operating leases term (in years) | 3 |
|
Maximum
|
|
| Operating lease | |
| Operating leases term (in years) | 10 |