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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2015 item	Mar. 31, 2014 item	Dec. 31, 2014
Concentration risks
Number of significant customers	3rvp_NumberOfSignificantCustomers	3rvp_NumberOfSignificantCustomers
Aggregate dollar amount of net sales to significant customers	$ 6,178,576us-gaap_SalesRevenueNet	$ 6,040,378us-gaap_SalesRevenueNet
Revenue recognition
Estimated contractual allowance	3,637,396rvp_AllowanceForContractualPricing		4,160,099rvp_AllowanceForContractualPricing
Change to reserve regarding non-contractual rebates	0rvp_IncreaseDecreaseInReserveForNonContractualRebates
Period for return of incorrect shipments	10 days
Number of times overstocking returns are limited	2rvp_RevenueRecognitionOverstockReturnLimitNumber
Period for return of product due to overstock	12 months
Maximum percentage of distributor's total purchase for the prior 12-month period	1.00%rvp_RevenueRecognitionMaximumPercentageOfDistributorsTotalPurchaseInPriorTwelveMonthPeriodForOverstockReturn
Sales | Customer Concentration Risk
Concentration risks
Aggregate dollar amount of net sales to significant customers	$ 3,500,000us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	$ 3,000,000us-gaap_SalesRevenueNet / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Concentration risk (as a percent)	57.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	49.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Product components | Supplier Concentration Risk
Concentration risks
Concentration risk (as a percent)	73.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsProductLineMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember	53.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_CostOfGoodsProductLineMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember

X

- Definition

For an unclassified balance sheet, a valuation allowance for payables due by the company that are expected to be not payable.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

Represents the number of significant customers.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

The period of time specified for overstock returns.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

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-Publisher FASB

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

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- Details

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

X

- Definition

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.

+ References

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)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

X

- Details

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