401(K) Plan (Tables)  | 
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nov. 30, 2017  | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of defined contribution plan | The Company made the following contributions during the 2017, 2016 and 2015 fiscal years:
  | 
||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
- References No definition available. 
  | 
| 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 
  |