Annual report pursuant to section 13 and 15(d)

Stock Option Plans - Additional Information (Detail)

v2.4.0.8
Stock Option Plans - Additional Information (Detail) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Employees
Dec. 31, 2012
Employees
Dec. 31, 2011
Employees
Dec. 31, 2013
Non Employees
Dec. 31, 2012
Non Employees
Dec. 31, 2011
Non Employees
Dec. 31, 2013
Two Thousand Three Plan
Sep. 18, 2003
Two Thousand Three Plan
Dec. 31, 2013
Two Thousand Three Plan
Maximum
Dec. 31, 2010
Amended Two Thousand Three Plan
Dec. 31, 2008
Amended Two Thousand Three Plan
Dec. 31, 2007
Amended Two Thousand Three Plan
Dec. 31, 2013
Performance Based Stock Options
Dec. 31, 2012
Performance Based Stock Options
Dec. 31, 2011
Performance Based Stock Options
Dec. 31, 2010
Performance Based Stock Options
Dec. 31, 2013
2013 Stock Incentive Plan
Dec. 31, 2013
Employee Restricted Stock Plan
Dec. 31, 2013
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                              
Common stock reserved for future issuance                       450,000   1,160,000 810,000 670,000         2,000,000    
Shares of common stock vested and exercisable                     406,353                        
Percentage of option price                     100.00%                        
Stock option period                         10 years               10 years    
Common stock vesting period                     3 years                   3 years    
Grant date weighted average fair value options   $ 0.39 $ 2.24                               $ 2.49        
Total intrinsic value $ 95,000                                            
Number of options exercised 108,146 0 0                                           
Intrinsic value of outstanding exercisable options 98,000                                            
Number of Shares Outstanding Under Option 407,020 706,803 737,020 670,355                         7,640 161,240 161,240 132,260      
Total fair value of shares vested 2,000 158,000 253,000                                        
Granted 0 54,250 224,250                           0 0 130,000   0    
Unrecognized compensation cost                                 0            
Weighted average term                                           3 years  
Common stock reserved for future issuance                                             1,257,500
Restricted shares forfeited under stock incentive plan                                             26,000
Shares available for issuance under stock incentive plan 680,953 381,170 353,953 423,618                                     768,500
Unrecognized compensation expense for restricted stock 1,019,000                                            
Weighted average grant date fair value                                             $ 1.94
Stock-based compensation expenses $ 809,000 $ 45,000 $ 301,000   $ 302,000 $ 45,000 $ 301,000 $ 506,000 $ 0 $ 0