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Concentration of Risk - Summary of Customers Accounted for More than Five Percent of Net Sales (Details)
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12 Months Ended | ||
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Nov. 30, 2013
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Nov. 30, 2012
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Nov. 30, 2011
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Walmart [Member]
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net saves accounted by customer (percent) | 43.00% | 35.00% | 36.00% |
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Walgreen [Member]
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net saves accounted by customer (percent) | 13.00% | 12.00% | 13.00% |
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C V S [Member]
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net saves accounted by customer (percent) | 9.00% | 7.00% | |
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Rite Aid [Member]
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net saves accounted by customer (percent) | 8.00% | 5.00% | |
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Foreign Sales [Member]
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| Concentration Risk [Line Items] | |||
| Percentage of Company's net saves accounted by customer (percent) | 5.00% | 4.50% | 4.50% |