| Related-Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 
|---|---|
| Dec. 31, 2010 | |
| Related Party Transaction [Line Items] | |
| Inventory purchased | $ 15.8 | 
| X | ||||||||||
| 
- Definition Wafer Inventory Purchased From And Research And Development Expenses Incurred With An Affiliate Of One Of The Company's Stockholders. No definition available. 
 | 
| X | ||||||||||
| 
- Details 
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