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Concentration of Risk - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Nov. 30, 2012
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Nov. 30, 2011
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Nov. 30, 2010
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net sales accounted by customers | 5.00% | 5.00% | 5.00% |
| Percentage of Company's net sales | 10.00% | 10.00% | 10.00% |
| Balances insured for cash by Insurance Corporation | $ 250,000 | ||
| Balances insured for securities | 500,000 | ||
| Balances insured for cash | 100,000 | ||
| Brokerage firm substantial Insurance coverage beyond Securities Investor Protection Corporation (SIPC)limit | $ 500,000 | ||
| X | ||||||||||
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- Definition
Federal Deposit Insurance Corporation Insurance Coverage No definition available.
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| X | ||||||||||
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- Definition
Maximum Amount Of Self Insurance Coverage No definition available.
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| X | ||||||||||
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- Definition
Maximum Insurance Coverage No definition available.
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| X | ||||||||||
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- Definition
Maximum Insurance Coverage For Cash No definition available.
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| X | ||||||||||
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- Definition
Product Category Net Sales Threshold Percentage No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. No definition available.
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