XML 16 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary of Outstanding Options Net of Expected Forfeitures (Vested And Expected to Vest) And Options Exercisable Under Our Stock Option Plans (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Aggregate intrinsic value  
Outstanding options (vested and expected to vest) $ 15,897
Options exercisable $ 8,930
Weighted-average remaining contractual term (in years)  
Outstanding options (vested and expected to vest) 7 years 4 months 24 days
Options exercisable 6 years 1 month 6 days
Weighted-average exercise price Per Share  
Outstanding options (vested and expected to vest) $ 3.33
Options exercisable $ 3.53
Number of Shares  
Outstanding options (vested and expected to vest) 12,347
Options exercisable 6,689