Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Assets [Abstract]
Cash and cash equivalents	$ 11,151,582	$ 18,519,856
Prepaid expenses and other current assets	690,440	403,819
Total Assets	11,842,022	18,923,675
Liabilities [Abstract]
Short-term debt	222,500	0
Accounts payable	2,648,287	3,520,271
Accrued expenses and other current liabilities	6,337,558	2,519,569
Total current liabilities	9,208,345	6,039,840
Warrant liabilities	1,012,490	567,439
Total Liabilities	10,220,835	6,607,279
Commitments and Contingencies
Equity [Abstract]
Common stock, par value of $0.0001; 115,000,000 shares authorized; 22,650,266 and 20,447,371 shares issued and outstanding as of June 30, 2023, and December 31, 2022, respectively	2,265	2,045
Additional paid-in capital	111,835,588	103,485,612
Accumulated deficit	(110,216,666)	(91,171,261)
Total stockholders' equity	1,621,187	12,316,396
Total Liabilities and Stockholders' Equity	$ 11,842,022	$ 18,923,675

Amount of expenses incurred but not yet paid nor invoiced, and current liabilities classified as other.

No definition available.

Name:	rvph_AccruedLiabilitiesAndOtherCurrentLiabilities
Namespace Prefix:	rvph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).