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Income Taxes - Summary of Investment Tax Credits Expire (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Income Tax Disclosure [Abstract]
2040	$ 1,687
2039	1,362
2038	776
2037	455
2036	24
Total	$ 4,304

X

- Definition

Investment tax credits.

+ References

No definition available.

+ Details

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Namespace Prefix:	rptx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Investment tax credits expire five.

+ References

No definition available.

+ Details

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X

- Definition

Investment tax credits expire four.

+ References

No definition available.

+ Details

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Namespace Prefix:	rptx_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Investment tax credits expire one.

+ References

No definition available.

+ Details

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Namespace Prefix:	rptx_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

X

- Definition

Investment tax credits expire three.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Investment tax credits expire two.

+ References

No definition available.

+ Details

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Namespace Prefix:	rptx_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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- References

No definition available.

+ Details

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