Quarterly report pursuant to Section 13 or 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.8.0.1
Share Repurchase Plan - Additional Information (Detail) - USD ($)
 1 Months Ended 9 Months Ended
Aug. 31, 2017
Jun. 20, 2016
Jun. 30, 2015
Aug. 31, 2017
Aug. 31, 2016
Nov. 30, 2016
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            
Tender offer to purchase common stock price per share     $ 3.25              
Percentage of outstanding common shares purchased under tender offer     7.76%              
Tender offer sales price     $ 2.29              
Repurchase agreement, aggregate amount   $ 9,866,178                
Repurchase agreement, aggregate amount   $ 8,000,000                
Treasury stock, shares 5,801,086     5,801,086   5,714,868        
Ki Yong Choi [Member]                    
Equity, Class of Treasury Stock [Line Items]                    
Number of shares repurchased   2,179,068                
Average price per share (repurchased)   $ 4.50                
Michael Cho [Member]                    
Equity, Class of Treasury Stock [Line Items]                    
Number of shares repurchased   13,416                
Average price per share (repurchased)   $ 4.50                
Maximum [Member]                    
Equity, Class of Treasury Stock [Line Items]                    
Tender offer to purchase common stock shares     750,000              
Common Stock [Member]                    
Equity, Class of Treasury Stock [Line Items]                    
Number of shares repurchased     557,805 86,915 2,429,033          
Average price per share (repurchased) $ 3.37   $ 3.25 $ 5.14 $ 4.39          
Share repurchase plan, shares repurchased value     $ 1,812,866              
Treasury stock, shares 5,801,086     5,801,086