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Share-Based Payments - Additional Information (Detail) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2003
Licensing Rights for Certain Key Intellectual Property
Dec. 31, 2012
Recognition Technology in Connection with Toy Products
Dec. 31, 2012
Minimum
Dec. 31, 2012
Maximum
Y
Dec. 31, 2012
Executive officer
Dec. 31, 2011
Executive officer
Dec. 31, 2010
Executive officer
Dec. 31, 2012
Executive officer
Minimum
Dec. 31, 2012
Executive officer
Maximum
Dec. 31, 2012
Non-employee directors
Dec. 31, 2011
Non-employee directors
Dec. 31, 2010
Non-employee directors
Dec. 31, 2012
Restricted Stock
Employee
Dec. 31, 2011
Restricted Stock
Dec. 31, 2010
Restricted Stock
Dec. 31, 2012
Restricted Stock
Minimum
Dec. 31, 2012
Restricted Stock
Maximum
Dec. 31, 2012
Stock Option And Award Plans
Dec. 31, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                              
Reserved shares of common stock for future issuance                                           6,525,000  
Vesting period             1 year 6 years       1 year 6 years 1 year           1 year 2 years   5 years
Restricted stock grants                           $ 100,000                  
Shares of restricted stock issued 79,812 141,480 297,874           40,750 49,769 240,000     39,062 26,480 47,874   65,231 10,000        
Restricted stock surrendered, (in shares)                 943 57,096             13,993            
Restricted stock surrendered, in values 103,000 1,263,000 177,000           100,000 1,000,000             200,000            
Shares of restricted stock cancelled                                 6,428            
Number of employee departed prior to vesting of their shares                                 3            
Restricted stock, unvested 95,315 142,184 324,635 436,443                         95,315 142,184 324,635        
Weighted average grant date fair value                                 1,600,000 2,600,000 4,900,000        
Unrecognized compensation, non-vested restricted stock awards $ 1,600,000                                            
Unrecognized compensation, non-vested restricted stock awards expected recognized period               1                              
Shares available for future grant 803,976                                            
Number of stock warrants granted to third party in connection with acquisition         100,000 1,500,000                                  
Exercise price of warrants         11.35 16.28                                  
Warrants exercisable term         10 years 5 years                                  
Stock warrants outstanding 1,500,000   100,000                                        
Weighted average exercise price of warrants outstanding 16.28   11.35                                        
Expiration date of warrants outstanding 2017-09-12