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Accounting for Stock-Based Compensation - Schedule of Share-based Compensation, Stock Options, Activity (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Exercised, Shares | 0 |  |  | 0 | 0
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Beginning Balance, Shares | 4,490,750 | 4,504,750 | 3,630,750 |  | 3,630,750
Granted, Shares |  |  | 901,000 |  |
Forfeited and cancelled, Shares |  | (14,000) | (27,000) |  |
Ending Balance, Shares | 4,490,750 | 4,490,750 | 4,504,750 |  | 4,490,750
Exercisable, Shares | 2,793,739 |  |  |  | 2,793,739
Beginning of Period, Weighted Average Exercise Price | $ 6.24 | $ 6.24 | $ 7.07 |  | $ 7.07
Granted, Weighted Average Exercise Price |  |  | 2.87 |  |
Forfeited and Cancelled, Weighted Average Exercise Price |  | 4.99 | 4.96 |  |
End of Period, Weighted Average Exercise Price | 6.24 | $ 6.24 | $ 6.24 |  | 6.24
Exercisable, Weighted Average Exercise Price | $ 6.99 |  |  |  | $ 6.99
Weighted Average Remaining Contractual Term | 7 years |  |  |  |
Exercisable, Weighted Average Remaining Contractual Term | 6 years |  |  |  |
Outstanding, Aggregate Intrinsic Value as of September 30, 2024 | $ 4 |  |  |  | $ 4
Exercisable, Aggregate Intrinsic Value as of September 30, 2024 | $ 1 |  |  |  | $ 1

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