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Consideration Transferred (Parenthetical) (Detail) $ in Thousands | Jun. 02, 2014 USD ($)
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Business Acquisition [Line Items] |
Working capital adjustment, reflected in other receivables as of December 31, 2014 | $ 66

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- Definition Business Acquisition Working Capital Adjustments + References No definition available. + Details
Name: | rgen_BusinessAcquisitionWorkingCapitalAdjustments
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