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Stock Options
Stock options are granted with the exercise price equal to the fair market value of our common stock on the grant date.
They are generally first exercisable between two and four years from the grant date and expire ten years from the grant date
(or earlier in the case of certain terminations of employment).
The following tables are a summary of stock option activity during 2015.
WeightedAverage
Remaining
Contractual Term
(in years)

Aggregate
Intrinsic
Value

Options

WeightedAvera