Quarterly report pursuant to Section 13 or 15(d)

Income (Loss) per Common Share - Additional Information (Detail)

v3.8.0.1
Income (Loss) per Common Share - Additional Information (Detail) - shares
3 Months Ended 9 Months Ended
Aug. 31, 2017
Aug. 31, 2017
Employee Stock Incentive Plan [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Number of outstanding options excluded from computation of diluted earnings per share 22,500 22,500