401(K) Plan (Tables)  | 
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Aug. 31, 2017  | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Retirement Benefits [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of company's matching contributions | 
 The Company made the following matching contributions: 
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| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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