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Cash Equivalents and Marketable Securities - Available-for-Sale Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Fair Value |  |  |
Less Than 12 Months | $ 97,193 | $ 25,166 | $ 59,998
12 Months or Longer | 0 | 0 |
Unrealized Losses |  |  |
Less Than 12 Months | (115) | (34) | (41)
12 Months or Longer | 0 | 0 |
Total, Fair Value | 97,193 | 25,166 | 59,998
Total, unrealized losses | (115) | (34) | (41)
Commercial paper |  |  |
Fair Value |  |  |
Less Than 12 Months | 78,820 | 17,699 | 47,425
12 Months or Longer | 0 | 0 |
Unrealized Losses |  |  |
Less Than 12 Months | (93) | (27) | (34)
12 Months or Longer | 0 | 0 |
Total, Fair Value | 78,820 | 17,699 | 47,425
Total, unrealized losses | (93) | (27) | (34)
U.S. government securities |  |  |
Fair Value |  |  |
Less Than 12 Months | 0 | 3,735 |
12 Months or Longer | 0 | 0 |
Unrealized Losses |  |  |
Less Than 12 Months | 0 | (1) |
12 Months or Longer | 0 | 0 |
Total, Fair Value | 0 | 3,735 |
Total, unrealized losses | 0 | (1) |
Corporate bonds |  |  |
Fair Value |  |  |
Less Than 12 Months | 18,373 | 3,732 | 12,573
12 Months or Longer | 0 | 0 |
Unrealized Losses |  |  |
Less Than 12 Months | (22) | (6) | (7)
12 Months or Longer | 0 | 0 |
Total, Fair Value | 18,373 | 3,732 | 12,573
Total, unrealized losses | $ (22) | $ (6) | $ (7)

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