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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 1 Months Ended |
--- | --- | ---
Jul. 31, 2011 BD item | May 31, 2010 BD | Sep. 30, 2007 BD and MDC Investment Holdings, Inc. item
COMMITMENTS AND CONTINGENCIES |  |  |
Recovery amount |  | $ 5,000,000 |
Period from specified date for permanent injunction to stay |  | 12 months |
Number of judges on panel | 3 |  |
Number of dissents being issued | 2 |  |
Number of U.S. patents infringed upon |  |  | 2

X
- Definition Represents the number of dissents being issued when entity's petition for rehearing by all of the judges of the Federal Circuit was denied. + References No definition available. + Details
Name: | rvp_LossContingencyNumberOfDissentsBeingIssued
Namespace Prefix: | rvp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of judges on panel of the court. + References No definition available. + Details
Name: | rvp_LossContingencyNumberOfJudgesOnPanelOfCourt
Namespace Prefix: | rvp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of U.S. patents held by the entity that were infringed upon by the counterparty. + References No definition available. + Details
Name: | rvp_LossContingencyNumberOfUSPatentsInfringed
Namespace Prefix: | rvp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the period from specified date for permanent injunction to stay. + References No definition available. + Details
Name: | rvp_LossContingencyPeriodFromSpecifiedDateForPermanentInjunctionToStay
Namespace Prefix: | rvp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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