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Consideration Transferred (Parenthetical) (Detail) $ in Thousands | Apr. 01, 2016 USD ($)
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Atoll GmbH |
Business Acquisition [Line Items] |
Working capital adjustments reflected in other receivables as of June 30, 2016 | $ 74

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- Definition Business Acquisition Working Capital Adjustments + References No definition available. + Details
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Namespace Prefix: | rgen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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