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           Property and Equipment - Additional Information (Detail) (USD $) 
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        12 Months Ended | |
|---|---|---|
| 
           Nov. 30, 2013 
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           Nov. 30, 2012 
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      |
| Property Plant And Equipment [Abstract] | ||
| Depreciation expense | $ 379,000 | $ 393,000 | 
| Depreciation amount included in cost of sales | $ 206,000 | $ 210,000 | 
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- Definition 
          Depreciation of property, plant and equipment directly related to goods produced and sold and services rendered by an entity during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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