Annual report pursuant to Section 13 and 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.6.0.2
Share Repurchase Plan - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 01, 2016
Nov. 30, 2016
Jun. 20, 2016
Jun. 30, 2015
Nov. 30, 2016
Nov. 30, 2015
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            
Share repurchase plan, shares repurchased value         $ 10,806,409 $ 3,205,435        
Repurchase agreement, aggregate amount     $ 9,866,178              
Repurchase agreement, aggregate amount     $ 8,000,000              
Treasury stock, shares   5,714,868     5,714,868 3,249,790        
Subsequent Event [Member]                    
Equity, Class of Treasury Stock [Line Items]                    
Number of shares repurchased 13,401                  
Average price per share (repurchased) $ 4.48                  
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 2,463,850 1,034,210        
Average price per share (repurchased)   $ 3.35   $ 3.25 $ 4.39 $ 3.10        
Share repurchase plan, shares repurchased value       $ 1,812,866            
Treasury stock, shares   5,713,171     5,713,171