Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details Textual)

v2.4.0.6
Stock-Based Compensation (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Stock Based Compensation (Textual) [Abstract]  
Unrecognized compensation expense related to unvested stock options and restricted stock, weighted-average recognition period 1 year 7 months 6 days
Stock Based Compensation (Additional Textual) [Abstract]  
Maximum number of stock options and restricted stock available for future issuance 1,381,852
Exercise prices of stock options outstanding, lower range $ 0.11
Exercise prices of stock options outstanding, upper range $ 15.34
Unrecognized compensation expense related to unvested stock options $ 5,876
Restricted Stock [Member]
 
Stock Based Compensation (Textual) [Abstract]  
Award vesting rights proportion One-Third
Number of vesting rights anniversaries 3
Unrecognized compensation expense related to unvested stock options and restricted stock, weighted-average recognition period 2 years 7 months 6 days
Unrecognized compensation expense related to unvested restricted stock 3,726
Shares of restricted stock became performance vested 181,625
2012 Plan [Member]
 
Stock Based Compensation (Textual) [Abstract]  
Unvested restricted stock, service condition 2 years
2012 Plan [Member] | Maximum [Member]
 
Stock Based Compensation (Textual) [Abstract]  
Unrecognized compensation expense related to unvested stock options and restricted stock, weighted-average recognition period 4 years
2012 Plan [Member] | Minimum [Member]
 
Stock Based Compensation (Textual) [Abstract]  
Unrecognized compensation expense related to unvested stock options and restricted stock, weighted-average recognition period 2 years
2012 Plan [Member] | Restricted Stock [Member]
 
Stock Based Compensation (Textual) [Abstract]  
Unrecognized compensation expense related to unvested restricted stock $ 5,909