XML 29 R18.htm IDEA: XBRL DOCUMENT v3.19.1

DIVIDENDS	12 Months Ended
	Dec. 31, 2018
DIVIDENDS
DIVIDENDS	12.   DIVIDENDS The Board declared and the Company paid dividends to Series I and Series II Class B Preferred Shareholders in the following amounts: $12,313 and $42,800, respectively, on April 21, 2016, July 28, 2016, October 20, 2016, January 6, 2017, April 24, 2017, July 20, 2017, October 20, 2017, January 19, 2018, April 24, 2018, July 20, 2018, October 23, 2018, and January 18, 2019.

X

- References

No definition available.

+ Details

Name:	rvp_DividendsDisclosureAbstract
Namespace Prefix:	rvp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the entire disclosure of dividends declared and paid by the entity.

+ References

No definition available.

+ Details

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