Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.2.0.727
Share-Based Compensation - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost $ 431,504 $ 339,780    
Two Thousand Stock Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options terms description Options may be granted with different vesting terms from time to time but not more than 50% on or after the first anniversary, 25% on or after the second anniversary, and 25% on or after the third anniversary.      
Expiration period 10 years      
Percentage of issued ordinary share capital 15.00%      
Number of option to grant 14,355,591      
Number of common stock outstanding 2,507,489      
Two Thousand Stock Plan [Member] | First Anniversary [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of vesting terms 50.00%      
Two Thousand Stock Plan [Member] | Third Anniversary [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of vesting terms 25.00%      
Two Thousand Stock Plan [Member] | Second Anniversary [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of vesting terms 25.00%      
Two Thousand And Seven Stock Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period 10 years      
Percentage of issued ordinary share capital 15.00%      
Number of option to grant 14,355,591      
Number of common stock outstanding 2,714,941      
Options grant description Option price of an incentive stock option granted to an employee or of a non-statutory stock option granted to any person who owns stock representing more than 10% of the total combined voting power of all classes of stock of the Company (or any parent or subsidiary) shall be no less than 110% of the fair market value per share on the date of grant. The option price of an incentive stock option granted to any other employee shall be no less than 100% of the fair market value per share on the date of grant.      
Common Stock Award [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized stock-based compensation expenses $ 0      
Granted options to purchase common stock 282,509 177,607    
Grant date fair value $ 85,825.00 $ 58,339.00    
compensation expense related to common stock awards 85,825 58,339    
Two Thousand Twelve Jsop [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost 279,484 $ 235,927    
Unrecognized share based compensation expense 326,066      
Fair value of award 853,889      
Two Thousand Twelve Jsop [Member] | First Quarter Two Thousand Fourteen [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
compensation expense related to accelerated vesting $ 326,066      
Non Employee Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock outstanding 416,000 416,000    
Options forfeited        
Granted options to purchase common stock   416,000    
Weighted-average period 3 years      
Granted options to purchase common stock 0 416,000    
Options exercised        
Option to purchase common stock vested 104,000      
Options to purchase common stock remaining unvested 288,000      
Unrecognized share based compensation expense $ 33,635      
Joint Share Ownership Plan Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected dividend yield 0.00%      
Awards issued   8,986,281 1,701,913  
Joint Share Ownership Plan Awards [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of share price $ 0.75      
Joint Share Ownership Plan Awards [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of share price $ 2.50      
Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected dividend yield 0.00%      
Forfeiture rate 0.00%      
Options forfeited 2,000,000      
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock outstanding 5,222,430 4,985,480   4,068,024
Options forfeited 2,011,671 23,009    
Granted options to purchase common stock 2,304,000 960,000    
Weighted average grand date fair value per share $ 0.07 $ 0.91    
Cash received form stock option exercises $ 2,090 $ 709    
Unrecognized stock-based compensation expenses $ 77,496      
Weighted-average period 2 years      
Granted options to purchase common stock 2,304,000      
Options exercised 55,379 19,535    
Options to purchase common stock remaining unvested 1,158,784 1,233,184