Quarterly report pursuant to Section 13 or 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.21.2
Share Repurchase Plan - Additional Information (Detail) - $ / shares
6 Months Ended
May 31, 2021
May 31, 2020
Nov. 30, 2020
Oct. 06, 2016
Apr. 08, 2015
Jun. 06, 2012
Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]              
Number of shares authorized to repurchase       8,000,000 6,000,000 3,000,000 1,000,000
Share repurchase plan open market purchases, privately negotiated block trades, unsolicited negotiated transactions, and/or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission            
Treasury stock, shares 6,093,535   6,093,535        
Common Stock [Member]              
Equity, Class of Treasury Stock [Line Items]              
Treasury stock, shares 6,093,535            
Repurchase agreement, purchase price per share $ 3.37            
Number of shares repurchased 0 0