XML 30 R21.htm IDEA: XBRL DOCUMENT
v3.23.1

RECLASSIFICATION OF PRIOR YEAR PRESENTATION | 3 Months Ended
--- | ---
Mar. 31, 2023
RECLASSIFICATION OF PRIOR YEAR PRESENTATION |
RECLASSIFICATION OF PRIOR YEAR PRESENTATION | 15. RECLASSIFICATION OF PRIOR YEAR PRESENTATION Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations. ​

X
- References No definition available. + Details
Name: | rvp_ReclassificationOfPriorYearPresentationAbstract
Namespace Prefix: | rvp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for classifying current financial statements, which may be different from classifications in the prior year's financial statements. Disclose any material changes in classification including an explanation of the reason for the change and the areas impacted. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -URI https://asc.fasb.org/topic&trid=2122149 + Details
Name: | us-gaap_Reclassifications
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration