| Contingent Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | 
|---|---|
| Contingent Liabilities | |
| Contingent liability, net of discount of $242 and $0, respectively | $ 758 | 
| X | ||||||||||
| 
- Definition Noncurrent portion of the fair value as of the acquisition date of potential payments under the contingent consideration arrangement, including cash and shares as applicable. No definition available. 
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| X | ||||||||||
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- Details 
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