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Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Measurements |  |
Total | $ 6,281 | $ 0
Level 1 [Member] |  |
Fair Value Measurements |  |
Total | 1,171 |
Level 2 [Member] |  |
Fair Value Measurements |  |
Total | 5,110 |
Level 3 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Mutual funds [Member] |  |
Fair Value Measurements |  |
Total | 1,171 |
Mutual funds [Member] | Level 1 [Member] |  |
Fair Value Measurements |  |
Total | 1,171 |
Mutual funds [Member] | Level 2 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Mutual funds [Member] | Level 3 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
US Treasury securities [Member] |  |
Fair Value Measurements |  |
Total | 3,278 |
US Treasury securities [Member] | Level 1 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
US Treasury securities [Member] | Level 2 [Member] |  |
Fair Value Measurements |  |
Total | 3,278 |
US Treasury securities [Member] | Level 3 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Certificates of deposit [Member] |  |
Fair Value Measurements |  |
Total | 859 |
Certificates of deposit [Member] | Level 1 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Certificates of deposit [Member] | Level 2 [Member] |  |
Fair Value Measurements |  |
Total | 859 |
Certificates of deposit [Member] | Level 3 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Corporate bonds and notes [Member] |  |
Fair Value Measurements |  |
Total | 973 |
Corporate bonds and notes [Member] | Level 1 [Member] |  |
Fair Value Measurements |  |
Total | 0 |
Corporate bonds and notes [Member] | Level 2 [Member] |  |
Fair Value Measurements |  |
Total | 973 |
Corporate bonds and notes [Member] | Level 3 [Member] |  |
Fair Value Measurements |  |
Total | $ 0 |

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