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OTHER LONG-TERM LIABILITIES (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
OTHER LONG-TERM LIABILITIES
Technology Investment Agreement (TIA)	$ 71,517,656	$ 75,459,612

X

- Definition

The amount of Long-term deferred liability relating to technology investment agreement.

+ References

No definition available.

+ Details

Name:	rvp_LongTermDeferredLiabilityTechnologyInvestmentAgreement
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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