Percentage of required upfront float for fees under agreement.

No definition available.

Name:	rvph_AgreementRequiredUpfrontFloatForFeesPercentage
Namespace Prefix:	rvph_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of upfront float left for the company to receive an invoice to replenish the float under the agreement.

+ References

No definition available.

+ Details

Name:	rvph_AgreementUpfrontFloatPercentageLeftToReceiveInvoiceToReplenish
Namespace Prefix:	rvph_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of upfront float used for the company to receive an invoice to replenish the float under the agreement.

+ References

No definition available.

+ Details

Name:	rvph_AgreementUpfrontFloatPercentageUsedToReceiveInvoiceToReplenish
Namespace Prefix:	rvph_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Monthly lease payment for lessee's operating lease.

+ References

No definition available.

+ Details

Name:	rvph_LesseeOperatingLeaseMonthlyLeasePayment
Namespace Prefix:	rvph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for upfront float.

+ References

No definition available.

+ Details

Name:	rvph_PaymentsForUpfrontFloat
Namespace Prefix:	rvph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of prepaid float.

+ References

No definition available.

+ Details

Name:	rvph_PrepaidFloat
Namespace Prefix:	rvph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of expense for prepaid float.

+ References

No definition available.

+ Details

Name:	rvph_PrepaidFloatExpense
Namespace Prefix:	rvph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LeaseContractualTermAxis=rvph_CorporateOfficeLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=rvph_CorporateOfficeLease2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=rvph_AgreementWithOneOfClinicalResearchOrganizationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 6 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Feb. 01, 2023
Operating Lease, Expense	$ 11,200	$ 5,000
Corporate Office Lease [Member]
Lessee, Operating Lease, Term of Contract	12 months
Lessee, Operating Lease, Monthly Lease Payment	$ 1,447
Lessee, Operating Lease, Renewal Term (Month)				12 months
Corporate Office Lease 2 [Member]
Lessee, Operating Lease, Term of Contract	12 months
Lessee, Operating Lease, Monthly Lease Payment	$ 4,300
Agreement With One of Clinical Research Organizations [Member]
Agreement, Required Upfront Float for Fees, Percentage	7.00%
Agreement, Upfront Float, Percentage Left to Receive Invoice to Replenish	15.00%
Agreement, Upfront Float, Percentage Used to Receive Invoice to Replenish	85.00%
Payments for Upfront Float	$ 120,250		$ 1,700,000
Prepaid Float Expense			$ 1,700,000
Prepaid Float	$ 0