Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Fair Value of Options Granted (Detail)

v3.10.0.1
Stockholders' Equity - Fair Value of Options Granted (Detail) - Service-Based Vesting Condition Options [Member]
 3 Months Ended 9 Months Ended
Aug. 31, 2017
Aug. 31, 2018
Aug. 31, 2017
Weighted average values:      
Expected life 5 years 5 years 5 years
Measurement Input, Expected Dividend Rate [Member]      
Weighted average values:      
Expected dividends 0.00 0.00 0.00
Measurement Input, Price Volatility [Member]      
Weighted average values:      
Expected dividends 0.5206 0.5080 0.5206
Measurement Input, Risk Free Interest Rate [Member]      
Weighted average values:      
Expected dividends 0.0182 0.0267 0.0182