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Employee Savings Plan - Additional Information (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2021 | Dec. 31, 2021
Retirement Benefits [Abstract] |  |
Percentage of non-matching employer contributions | 3.00% |
Matching contribution expense |  | $ 0.5

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- Definition Defined contribution plan employer non matching contribution percent. + References No definition available. + Details
Name: | rptx_DefinedContributionPlanEmployerNonMatchingContributionPercent
Namespace Prefix: | rptx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration