| Proxy Contests - Additional Information (Detail) (USD $) | 12 Months Ended | ||||
|---|---|---|---|---|---|
| Nov. 30, 2013
 Participant | Nov. 30, 2012
 Participant | May 30, 2012
 Directors | Aug. 25, 2011 | May 09, 2011
 Directors | |
| Compensation Related Costs [Abstract] | |||||
| Number of directors nominated | 6 | 5 | |||
| Cash transferred to trust | $ 2,500,000 | ||||
| Legal fees paid | 97,140 | 81,250 | |||
| Balance in the trust | $ 764,192 | $ 2,372,439 | |||
| Total number of participants | 3 | 3 | |||
| X | ||||||||||
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- Definition Investment held in trust. No definition available. 
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- Definition Legal fee paid on behalf of participants. No definition available. 
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- Definition Number of directors nominated. No definition available. 
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- Definition Number of participants continues to be employed by the company. No definition available. 
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- Definition Restricted cash transferred to trust. No definition available. 
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- Details 
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