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LEASES (Tables)

6 Months Ended

Jun. 30, 2021

LEASES

Schedule of assets and liabilities relating to leases included in the Condensed Balance Sheets

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​	​	​	​	​	​	​
​		September 30, 2021			December 31, 2020
OPERATING LEASES		​			​
Other assets	​	$	—	​	$	38,892
Other accrued liabilities	​	$	—	​	$	38,892
Other long-term liabilities	​		—	​		—
Total operating lease liabilities	​	$	—	​	$	38,892

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- Definition

Tabular disclosure of assets and liabilities associated with the leases included in the Balance Sheets.

+ References

No definition available.

+ Details

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Namespace Prefix:	rvp_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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