Quarterly report pursuant to Section 13 or 15(d)

Stock Option (Detail)

v2.4.0.8
Stock Option (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Shares      
Beginning Balance 2,162,067   2,296,020
Granted 25,000    
Exercised (227,337)    
Forfeited or expired (72,401)    
Ending Balance 1,887,329 2,162,067 2,296,020
Exercisable at end of period 695,459    
Expected to Vest 1,131,684    
Weighted Average Exercise Price      
Beginning Balance $ 5.09    
Granted $ 8.40    
Exercised $ 4.82    
Forfeited or expired $ 13.30    
Ending Balance $ 4.85 $ 5.09  
Exercisable at end of period $ 5.18    
Expected to Vest $ 4.66    
Weighted Average Grant Date Fair value      
Beginning Balance $ 3.57    
Granted $ 4.73    
Exercised $ 3.74    
Forfeited or expired $ 8.52    
Ending Balance $ 3.38 $ 3.57  
Exercisable at end of period $ 3.80    
Expected to Vest $ 3.13    
Weighted Average Remaining Contractual Term      
Outstanding 5 years 1 month 6 days 5 years 6 months  
Exercisable at end of period 3 years 4 months 24 days    
Expected to Vest 6 years 1 month 6 days    
Aggregate Intrinsic Value      
Beginning Balance $ 8,491    
Exercised 977    
Forfeited or expired 11    
Ending Balance 5,652 8,491  
Exercisable at end of period 2,110    
Expected to Vest $ 3,363