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v3.25.0.1

Net Loss Per Share Additional Information (Details) - shares | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Earnings Per Share [Abstract] |  |
Pre-funded warrants to purchase common stock | 83,403,425 | 4,000,000

X
- Definition Pre-funded warrants to purchase common stock. + References No definition available. + Details
Name: | rapt_PreFundedWarrantsToPurchaseCommonStock
Namespace Prefix: | rapt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration