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Stock-Based Compensation - Stock Option (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | 15 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2024
The Company and Summary of Significant Accounting Policies |  |  |
Weighted average grant date fair value of options granted |  | $ 0.01 |
Granted | 0 | 105,000 | 0
Unrecognized compensation cost related to employee stock option compensation arrangements | $ 2,000 |  |
Expected weighted average period for recognition of unrecognized compensation cost related to employee stock option compensation arrangements | 1 year 3 months 18 days |  |
Capitalized stock-based compensation costs | $ 0 | $ 0 |
Recognized stock-based compensation tax benefits | $ 0 | $ 0 |

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