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v3.21.2

LEASES (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
LEASES |
Schedule of assets and liabilities relating to leases included in the Condensed Balance Sheets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 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
Name: | rvp_LeaseBalanceSheetDisclosureTableTextBlock
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