Name:	rvp_AllowanceForContractualPricing
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

This element represents change in the provision for the collectability of customers' contractual rebates.

No definition available.

Name:	rvp_IncreaseDecreaseInReserveForContractualRebates
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the judgment amount received by the entity subject to stipulation.

No definition available.

Name:	rvp_JudgmentAmountReceivedSubjectToStipulation
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the number of significant customers.

No definition available.

Name:	rvp_NumberOfSignificantCustomers
Namespace Prefix:	rvp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the maximum percentage of distributor's total purchase in prior 12-month period for overstock return.

No definition available.

Name:	rvp_RevenueRecognitionMaximumPercentageOfDistributorsTotalPurchaseInPriorTwelveMonthPeriodForOverstockReturn
Namespace Prefix:	rvp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The number of overstock returns available to a customer within a specified period of time.

No definition available.

Name:	rvp_RevenueRecognitionOverstockReturnLimitNumber
Namespace Prefix:	rvp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The period of time specified for overstock returns.

No definition available.

Name:	rvp_RevenueRecognitionOverstockReturnPeriod
Namespace Prefix:	rvp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the period for return of incorrect shipments, following arrival at the distributor's facility.

No definition available.

Name:	rvp_RevenueRecognitionPeriodForReturnOfIncorrectShipments
Namespace Prefix:	rvp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount of increase (decrease) in the allowance for doubtful accounts.

No definition available.

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

Name:	us-gaap_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_GainLossRelatedToLitigationSettlementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_RevenueRecognitionAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_LitigationCaseAxis=rvp_BectonDickinsonAndCompanyCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_CostOfGoodsProductLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: