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OTHER LONG-TERM LIABILITIES (Details)	Dec. 31, 2020 USD ($)
OTHER LONG-TERM LIABILITIES
Stock repurchase	$ 2,034,373
Technology Investment Agreement (TIA)	22,444,324
Total	$ 24,478,697

X

- Definition

The amount of Long-term deferred liability relating to preferred stock redemption.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
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X

- References

No definition available.

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X

- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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