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Stock Compensation (Tables)
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Valuation Assumptions Used for Valuation of Fair Value of Stock Compensation Granted
We utilized the Black-Scholes valuation model for estimating the fair value of the stock compensation granted, with the following weighted-average assumptions:
Employee Stock OptionsEmployee Stock Purchase Plan
For the Three Months EndedFor the Nine Months EndedFor the Three Months EndedFor the Nine Months Ended
September 30,September 30,
20252024202520242025202420252024
Average risk-free interest rates3.99 %4.18 %4.13 %4.15 %3.83 %4.38 %4.03 %4.96 %
Average expected life (in years)5.175.175.015.020.500.500.500.50
Volatility29 %29 %29 %30 %32 %28 %35 %24 %
Weighted-average fair value (in dollars)$23.58 $21.54 $23.45 $21.02 $14.72 $12.11 $14.95 $11.27 
Schedule of Option Activity Under the 2010 Stock Plan
Option activity under our 2010 Stock Plan and 2024 Inducement Plan was as follows:
Shares Subject to
Outstanding Options
SharesWeighted Average
Exercise Price
Balance at December 31, 202412,777,974$83.45 
Options granted1,331,262$71.04 
Options exercised(667,616)$71.32 
Options cancelled(590,480)$82.55 
Balance at September 30, 202512,851,140$82.83 
Schedule of RSU Award and PSU Activity Under the 2010 Stock Plan
RSU and PSU award activity under the 2010 Stock Plan and 2024 Inducement Plan was as follows:
Shares Subject to
Outstanding Awards
SharesGrant Date Value
Balance at December 31, 20248,656,803$67.81 
RSUs granted 3,422,768$68.71 
PSUs granted873,728$56.72 
Additional PSUs earned32,148$70.45 
RSUs released(2,500,344)$71.11 
PSUs released(143,776)$77.67 
RSUs cancelled (341,581)$67.18 
PSUs cancelled(124,489)$75.76 
Balance at September 30, 20259,875,257$66.59 
Schedule of Shares Available for Grant
The following table summarizes our shares available for grant under the 2010 Stock Plan and 2024 Inducement Plan. Previously, each RSU and PSU grant reduced the available share pool by 2 shares. In June 2025, our stockholders approved an amendment to the 2010 Stock Plan to remove the fungible ratio, and all awards granted under the 2010 Stock Plan after June 10, 2025, the date of our latest annual meeting, will reduce the share reserve on a one-for-one basis. If awards granted under the 2010 Stock Plan on or prior to June 10, 2025 expire, become unexercisable or are forfeited or repurchased after that date, the shares that were subject to those awards will become available for future grant only on a one-for-one basis, even if the original award was a full value award that reduced the share reserve on a two-for-one basis. The 2024 Inducement Plan was amended in June 2025 to remove the provision that stated that any shares issued in connection with awards other than options and stock appreciation rights will be counted against the authorized share limitation as 2.0 shares for every one share so issued and, as a result, all awards granted under the 2024 Inducement Plan will reduce the share reserve thereunder on a one-for-one basis.
Shares Available
for Grant
Balance at December 31, 20244,013,611
Additional authorization - 2010 Stock Plan8,500,000
Additional authorization - 2024 Inducement Plan1,000,000
Options, RSUs and PSUs granted and issuance of shares for services rendered(6,140,010)
Options, RSUs and PSUs cancelled1,217,120
Fungible ratio change adjustments282,731
Balance at September 30, 20258,873,452