Quarterly report pursuant to Section 13 or 15(d)

Summary of Option Activity (Detail)

v2.4.0.6
Summary of Option Activity (Detail) (USD $)
 3 Months Ended
Mar. 31, 2013
Number of Shares  
Beginning Balance 3,860,000
Plus: Options granted 612,000
Less: Options exercised (29,000)
Options forfeited, canceled, or expired (106,000)
Ending Balance 4,337,000
Options exercisable at March 31, 2013 2,460,000
Vested options expired during the quarter ended March 31, 2013   
Weighted Average Exercise Price Per Share  
Beginning Balance $ 3.48
Plus: Options granted $ 3.76
Less: Options exercised $ 2.53
Options forfeited, canceled, or expired $ 3.68
Ending Balance $ 3.47
Options exercisable at March 31, 2013 $ 3.84
Vested options expired during the quarter ended March 31, 2013   
Weighted Average Remaining Contractual Life (In years)  
Options outstanding 3 years 10 months 24 days
Options exercisable 3 years 7 months 24 days
Aggregate intrinsic value  
Options outstanding $ 5,379,000 [1]
Options exercisable $ 3,099,000 [1]
[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 the grant.