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Activity Under Equity Incentive Plans Related to Stock Options (Detail) - 2008 Equity Incentive Plan
shares in Thousands
9 Months Ended
Sep. 30, 2024
$ / shares
shares
Activity under the Company's equity incentive plans related to stock options  
Number of Options Outstanding, Beginning Balance | shares 14,515
Forfeited/canceled, Number of Options Outstanding | shares (2,193)
Number of Options Outstanding, Ending Balance | shares 12,322
Weighted Average Exercise Price per Share  
Weighted Average Exercise Price per Share, Beginning Balance | $ / shares $ 5.20
Forfeited/canceled, Weighted Average Exercise Price per Share | $ / shares 5.81
Weighted Average Exercise Price per Share, Ending Balance | $ / shares $ 5.1