| Legal Proceedings - Additional Information (Detail) (USD $) | May 25, 2011 | 
|---|---|
| Commitments And Contingencies Disclosure [Abstract] | |
| Jurisdictional amount of the court | $ 75,000 | 
| X | ||||||||||
| 
- Definition Jurisdictional amount of the court. No definition available. 
 | 
| X | ||||||||||
| 
- Details 
 |