Summary of Significant Accounting Policies - Additional Information (Detail) |
6 Months Ended | |
|---|---|---|
May. 31, 2015 |
May. 31, 2014 |
|
| Summary Of Significant Accounting Policies [Line Items] | ||
| Income tax position rate | 50.00% | |
| Customer Concentration Risk | Revenues | UNITED STATES | ||
| Summary Of Significant Accounting Policies [Line Items] | ||
| Concentration risk | 44.00% | 48.00% |
| Customer Concentration Risk | Revenues | CANADA | ||
| Summary Of Significant Accounting Policies [Line Items] | ||
| Concentration risk | 1.00% | 4.00% |
| Customer Concentration Risk | Revenues | UNITED KINGDOM | ||
| Summary Of Significant Accounting Policies [Line Items] | ||
| Concentration risk | 10.00% | 10.00% |