XML 50 R41.htm IDEA: XBRL DOCUMENT v3.22.2.2

FAIR VALUE OF FINANCIAL INSTRUMENTS - Gross unrealized gains and losses (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Gross unrealized gains and losses from Investments in equity securities
Unrealized (gain) loss on investments in equity securities	$ (1,187,629)	$ 816,150
Investments in equity securities
Gross unrealized gains and losses from Investments in equity securities
Cost	24,989,715		$ 10,747,733
Gains	1,591,542		2,521,253
Losses	(266,883)
Aggregate Fair Value	26,314,374		13,268,986
Equity securities
Gross unrealized gains and losses from Investments in equity securities
Cost	22,866,864		6,729,245
Gains	1,591,542		2,383,362
Aggregate Fair Value	24,458,406		9,112,607
Mutual funds and exchange traded funds
Gross unrealized gains and losses from Investments in equity securities
Cost	2,122,851		4,018,488
Gains			137,891
Losses	(266,883)
Aggregate Fair Value	$ 1,855,968		$ 4,156,379

X

- Definition

Amount of accumulated gross unrealized gain on investments in equity securities measured at fair value.

+ References

No definition available.

+ Details

Name:	rvp_EquitySecuritiesAccumulatedGrossUnrealizedGain
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of accumulated gross unrealized loss on investments in equity securities measured at fair value.

+ References

No definition available.

+ Details

Name:	rvp_EquitySecuritiesAccumulatedGrossUnrealizedLoss
Namespace Prefix:	rvp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

No definition available.

+ Details

Name:	us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d))
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117546-209714

+ Details

Name:	us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rvp_EquitySecuritiesExcludingMutualFundsAndExchangeTradedFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rvp_MutualFundsAndExchangeTradedFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: