Annual report pursuant to Section 13 and 15(d)

Summary of Option Activity (Detail)

v2.4.0.8
Summary of Option Activity (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Number of Shares      
Beginning Balance 3,860,000 3,858,000 4,130,000
Exercised (343,000) (214,000) (657,000)
Forfeited, cancelled, or expired (765,000) (966,000) (766,000)
Ending Balance 4,441,000 3,860,000 3,858,000
Options exercisable, December 31, 2013 2,688,000    
Vested options expired during the twelve months ended December 31, 2013 90,000    
Weighted Average Exercise Price Per Share      
Beginning Balance $ 3.48 $ 3.75 $ 3.60
Exercised $ 2.07 $ 2.12 $ 2.08
Forfeited, cancelled, or expired $ 4.23 $ 3.63 $ 4.92
Ending Balance $ 3.51 $ 3.48 $ 3.75
Options exercisable, December 31, 2013 $ 3.51    
Vested options expired during the twelve months ended December 31, 2013 $ 11.24    
Weighted Average Remaining Contractual Term (In Years)      
Options outstanding 3 years 9 months 29 days    
Options exercisable 3 years 2 months 1 day    
Aggregate Intrinsic Value      
Options outstanding $ 1,574,000 [1]    
Options exercisable $ 1,343,000 [1]    
Granted at Fair Market Value
      
Number of Shares      
Granted 711,000 614,000 1,151,000
Weighted Average Exercise Price Per Share      
Granted $ 3.79 $ 2.61 $ 4.11
Granted at Above Fair Market Value
      
Number of Shares      
Granted 978,000 568,000   
Weighted Average Exercise Price Per Share      
Granted $ 3.72 $ 2.45   
[1] The intrinsic value calculation does not include negative values. This can occur when the fair market value on the reporting date is less than the exercise price of a grant.