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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - shares |  | 6 Months Ended
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Apr. 17, 2023 | Jun. 30, 2023
FlexBiosys, Inc. |  |
Shares of common stock issued for acquisition | 31,415 | 31,415

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=rgen_FlexbiosysIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |