Quarterly report pursuant to Section 13 or 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.5.0.2
Share Repurchase Plan - Additional Information (Detail) - USD ($)
 1 Months Ended 6 Months Ended
Jun. 30, 2015
May 31, 2016
May 31, 2015
Jun. 20, 2016
Nov. 30, 2015
Apr. 08, 2015
Jun. 06, 2012
Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]                
Number of shares authorized to repurchase           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              
Number of shares repurchased   143,793 344,026          
Average price per share (repurchased)   $ 3.08 $ 2.77          
Treasury stock, shares   3,393,114     3,249,790      
Subsequent Event [Member]                
Equity, Class of Treasury Stock [Line Items]                
Repurchase agreement, aggregate amount       $ 9,866,178        
Repurchase agreement, aggregate amount       $ 8,000,000        
Subsequent Event [Member] | Ki Yong Choi [Member]                
Equity, Class of Treasury Stock [Line Items]                
Number of shares authorized to repurchase       2,179,068        
Repurchase agreement, purchase price per share       $ 4.50        
Subsequent Event [Member] | Michael Cho [Member]                
Equity, Class of Treasury Stock [Line Items]                
Number of shares authorized to repurchase       13,416        
Repurchase agreement, purchase price per share       $ 4.50        
Privately Negotiated Or Open Market Transactions [Member]                
Equity, Class of Treasury Stock [Line Items]                
Number of shares repurchased   3,393,114            
Average price per share (repurchased)   $ 2.58            
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              
Average price per share (repurchased) $ 3.25              
Share repurchase plan, shares repurchased value $ 1,812,866