Annual report pursuant to Section 13 and 15(d)

Share Repurchase Plan - Additional Information (Detail)

v2.4.0.8
Share Repurchase Plan - Additional Information (Detail) (USD $)
12 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Jun. 06, 2012
Dec. 31, 2011
Schedule of Share Repurchase Plan [Line Items]        
Number of shares authorized to repurchase     (3,000,000) (1,000,000)
Number of shares repurchased 1,126,815      
Average price per share (repurchased) $ 2.17      
Treasury stock, shares 1,276,915 942,474    
Shares repurchase plan Open market purchases, Privately negotiated block trades, Unsolicited negotiated transactions, and/or trading plan in accordance with Rule 10b5-1 of the Securities and Exchange Commission      
Common stock additional share repurchased 59,906      
Average price per share additional repurchased $ 1.87      
Saneron [Member]
       
Schedule of Share Repurchase Plan [Line Items]        
Treasury stock, shares 150,100 150,100