XML 51 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Information Regarding Option Activity (Parenthetical) (Detail) | Sep. 30, 2013
--- | ---
Awards Granted to Non-Executive Level Employees |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Estimated forfeiture rates | 8.00%
Awards Granted to Executive Level Employees |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Estimated forfeiture rates | 3.00%

X
- Definition Percentage of Shares Subject to Forfeiture + References No definition available. + Details
Name: | rgen_PercentageOfSharesSubjectToForfeiture
Namespace Prefix: | rgen_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration