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LONG-TERM DEBT (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Long-term debt
Long term debt total	$ 3,574,772us-gaap_LongTermDebt	$ 3,823,996us-gaap_LongTermDebt
Less: current portion	(149,744)us-gaap_LongTermDebtCurrent	(247,064)us-gaap_LongTermDebtCurrent
Long term debt, excluding current maturities	3,425,028us-gaap_LongTermDebtNoncurrent	3,576,932us-gaap_LongTermDebtNoncurrent
Loan from American First National Bank
Long-term debt
Long term debt total	3,574,772us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember	3,717,795us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember
Amortization period	20 years	20 years
Maturity period of debt instrument	10 years	10 years
Interest rate (as a percent)	5.968%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember	5.968%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember
Note Payable to Deutsche Leasing USA Inc 5.57 Percent Due April 2014
Long-term debt
Long term debt total		39,169us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member
Maturity period of debt instrument	36 months	36 months
Interest rate (as a percent)	5.57%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member	5.57%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member
Original amount of note	327,726us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member	327,726us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member
Principal and interest repayment	9,900us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member	9,900us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member
Number of molding machines used to collateralized debt	3rvp_DebtInstrumentCollateralizedByNumberOfMoldingInstruments / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member	3rvp_DebtInstrumentCollateralizedByNumberOfMoldingInstruments / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueApril2014Member
Note Payable to Deutsche Leasing USA Inc 5.57 Percent Due November 2014
Long-term debt
Long term debt total		67,032us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member
Maturity period of debt instrument	36 months	36 months
Interest rate (as a percent)	5.57%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member	5.57%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member
Original amount of note	207,260us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member	207,260us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member
Principal and interest repayment	$ 6,300us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member	$ 6,300us-gaap_DebtInstrumentPeriodicPayment / us-gaap_LongtermDebtTypeAxis = rvp_NotePayableToDeutscheLeasingUSAInc5.57PercentDueNovember2014Member

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Period over which debt will be amortized.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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