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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