Quarterly report pursuant to Section 13 or 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.7.0.1
Share Repurchase Plan - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 01, 2017
Feb. 28, 2017
Jun. 20, 2016
Jun. 30, 2015
Feb. 28, 2017
Feb. 29, 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   5,734,597     5,734,597 5,714,868          
Subsequent Event [Member]                      
Equity, Class of Treasury Stock [Line Items]                      
Number of shares repurchased 4,265                    
Average price per share (repurchased) $ 4.54                    
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 19,729 133,575          
Average price per share (repurchased)   $ 3.35   $ 3.25 $ 4.50 $ 3.06          
Share repurchase plan, shares repurchased value       $ 1,812,866              
Treasury stock, shares   5,733,900     5,733,900