Annual report pursuant to Section 13 and 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.3.1.900
Share Repurchase Plan - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 01, 2015
Jun. 30, 2015
Nov. 30, 2015
Nov. 30, 2014
Jun. 06, 2012
Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]            
Number of shares authorized to repurchase         (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     3,249,790      
Average price per share (repurchased)     $ 2.56      
Share repurchase plan, shares repurchased value     $ 3,205,435 $ 2,671,060    
Treasury stock, shares     3,249,790 2,215,111    
Subsequent Event [Member]            
Equity, Class of Treasury Stock [Line Items]            
Number of shares repurchased 49,985          
Average price per share (repurchased) $ 3.24          
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        
Saneron [Member]            
Equity, Class of Treasury Stock [Line Items]            
Treasury stock, shares     0 150,100