Name:	rvp_FiniteLivedIntangibleAssetsQuarterlyPaymentsAsPercentageOfRoyaltyFeeOnGrossSales
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Represents the amount of gross sales upon which royalties are based.

No definition available.

Name:	rvp_GrossSalesUponWhichRoyaltiesAreBased
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Represents information related to the percentage of royalties fees payment.

No definition available.

Name:	rvp_PercentageOfRoyaltiesFeesPayment
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Data Type:	dtr-types:percentItemType
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Period Type:	duration

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.7-03.15(a))
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-Subparagraph (SX 210.9-03.15(5))
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Name:	us-gaap_AccruedRoyaltiesCurrentAndNoncurrent
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Data Type:	xbrli:monetaryItemType
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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
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Name:	us-gaap_CostOfGoodsAndServicesSold
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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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.