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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Self-insured employee benefit costs (Details) | Jun. 30, 2024 USD ($)
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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Self-insured threshold for individual claims | $ 100,000
Self-insured threshold for total plain claims for the year | $ 1,700,000

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- Definition The threshold amount of self-insurance for health insurance benefit liability for total plan claims for the year assumed by the Company. + References No definition available. + Details
Name: | rvp_HealthInsuranceBenefitsSelfInsuranceThresholdForTotalPlanClaims
Namespace Prefix: | rvp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The threshold minimum amount of self-insurance for individual claims health insurance benefit liability assumed by the Company. + References No definition available. + Details
Name: | rvp_HealthInsuranceBenefitsSelfInsuranceThresholdMinimumForIndividualClaims
Namespace Prefix: | rvp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration