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COMMITMENTS AND CONTINGENCIES (Details) (USD $)	1 Months Ended
	May 31, 2010 BD	Sep. 30, 2012 BD item	Jul. 31, 2011 BD item	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 issues that were contested in the appeal		8
Number of issues in which the entity and the officer prevailed under appeal		6
Number of issues in which the counterparty prevailed under appeal		2
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 issues prevailed on, that were contested in the appeal by entity and officer.

+ References

No definition available.

+ Details

Name:	rvp_LossContingencyNumberOfIssuesPrevailedInAppealByEntityAndOfficer
Namespace Prefix:	rvp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of issues prevailed on, that were contested in the appeal by plaintiff.

+ References

No definition available.

+ Details

Name:	rvp_LossContingencyNumberOfIssuesPrevailedInAppealByPlaintiff
Namespace Prefix:	rvp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of issues that were contested in the appeal.

+ References

No definition available.

+ Details

Name:	rvp_LossContingencyNumberOfIssuesThatWereContestedInAppeal
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:	instant

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