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
 6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Shares      
Beginning Balance 2,162,067   2,410,330
Granted 25,000    
Exercised (203,083)    
Forfeited or expired (70,026)    
Ending Balance 1,913,958 2,162,067 2,410,330
Exercisable at end of period 604,213    
Expected to Vest 1,243,607    
Weighted Average Exercise Price      
Beginning Balance $ 5.09    
Ending Balance $ 4.85 $ 5.09  
Exercisable at end of period $ 5.72    
Expected to Vest $ 4.45    
Weighted Average Grant Date Fair value      
Beginning Balance $ 3.57    
Ending Balance $ 3.39 $ 3.57  
Exercisable at end of period $ 4.14    
Expected to Vest $ 3.04    
Weighted Average Remaining Contractual Term      
Outstanding 5 years 4 months 24 days 5 years 6 months  
Exercisable at end of period 3 years 4 months 24 days    
Expected to Vest 6 years 3 months 18 days    
Aggregate Intrinsic Value      
Beginning Balance $ 8,491    
Ending Balance 9,092 8,491  
Exercisable at end of period 2,537    
Expected to Vest $ 6,224