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
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Shares    
Beginning Balance 2,162,067 2,580,033
Granted 10,000  
Exercised (102,333)  
Forfeited or expired (39,275)  
Ending Balance 2,030,459 2,580,033
Exercisable at end of period 735,714  
Expected to Vest 1,229,362  
Weighted Average Exercise Price    
Beginning Balance $ 5.09  
Ending Balance $ 5.00  
Exercisable at end of period $ 6.03  
Expected to Vest $ 4.41  
Weighted Average Grant Date Fair value    
Beginning Balance $ 3.57  
Ending Balance $ 3.51  
Exercisable at end of period $ 4.36  
Expected to Vest $ 3.02  
Weighted Average Remaining Contractual Term    
Outstanding at beginning of period 5 years 6 months  
Outstanding at end of period 5 years 4 months 24 days  
Exercisable at end of period 3 years 6 months  
Expected to Vest 6 years 6 months  
Aggregate Intrinsic Value    
Beginning Balance $ 8,491  
Ending Balance 10,535  
Exercisable at end of period 3,314  
Expected to Vest $ 6,857