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v3.21.1

LEASES (Tables) | 12 Months Ended
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Dec. 31, 2020
LEASES |
Schedule of assets and liabilities relating to leases included in the Condensed Balance Sheets | Assets and liabilities associated with these leases included in the Balance Sheets are as follows:
|  | December 31,
|  | 2020 |  | 2019
OPERATING LEASES |  |  |  |  |  |
Other assets |  | $ | 38,892 |  | $ | 82,359
Other accrued liabilities |  | $ | 38,892 |  | $ | 82,359
Other long-term liabilities |  |  | — |  |  | —
Total operating lease liabilities |  | $ | 38,892 |  | $ | 82,359

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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