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TECHNOLOGY INVESTMENT AGREEMENT (Details)		1 Months Ended
	Jul. 01, 2020	May 31, 2021 item	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
TECHNOLOGY INVESTMENT AGREEMENT
Long-term deferred liability - TIA			$ 59,402,231
Technology Investment Agreement (TIA)
TECHNOLOGY INVESTMENT AGREEMENT
Technology investment agreement term	10 years
Number of assembly lines added | item		2
Long-term deferred liability - TIA				$ 63,872,553

X

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The number of assembly lines provided under the agreement.

+ References

No definition available.

+ Details

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

X

- Definition

Technology investment agreement, term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 730
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483041/730-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 730
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483041/730-20-50-1

+ Details

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- Details

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