XML 35 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended
May 31, 2013
Restricted Stock Grants [Member]
Sep. 30, 2013
Restricted Stock Grants [Member]
May 31, 2013
Restricted Stock Grants [Member]
Non-Employee Members of Board of Directors [Member]
Sep. 30, 2013
Restricted Stock Grants [Member]
Executive Officers [Member]
Y
Sep. 30, 2013
Employee Stock Option [Member]
Dec. 31, 2012
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares granted   585 10 575    
Percentage of shares to vest each year       20.00%    
Vesting period     1 year 5 years 4 years  
Number of anniversaries of the vesting date following the date of grant       4    
Non employee director voting rights and vesting description The one year anniversary of the date of grant or immediately prior to the following year’s annual meeting of stockholders, subject to acceleration in the event of a change in control.          
Shares withheld for taxes   40        
Common stock in lieu of taxes   $ 973        
Expiration period of options         10 years  
Options granted         25 0