Note 9 - Subsequent Events	3 Months Ended
Mar. 31, 2026
Notes to Financial Statements
Subsequent Events [Text Block]	9. SUBSEQUENT EVENTS Nasdaq Delisting & OTC Quotation Our common stock was previously listed on The Nasdaq Capital Market (“Nasdaq”). As previously disclosed, our common stock was not in compliance with the requirement under Nasdaq Listing Rule 5550(a)(2) to maintain a minimum bid price of $1.00 per share for continued listing on Nasdaq (the “Bid Price Requirement”), and we had until May 11, 2026, which was the maximum extent of the discretionary authority of the Nasdaq Hearings Panel (the “Panel”). Having not regained compliance with the Bid Price Requirement by such date, we received a letter from the Panel dated May 12, 2026 indicating that the Panel had determined to delist our common stock from Nasdaq. Our common stock will be suspended from trading on Nasdaq as of the open of trading on May 14, 2026. Beginning on May 14, 2026, our common stock will be quoted on the OTCQB Venture Market operated by OTC Markets Group Inc. (the "OTCQB Venture Market") under its existing symbol “RVPH.” The above discussed NASDAQ delisting and quotation on the OTCQB Venture Market does not impact the Company's outstanding common stock, warrants, prefunded warrants or stock options.

Note 9 - Subsequent Events

3 Months Ended

Mar. 31, 2026

9. SUBSEQUENT EVENTS

Nasdaq Delisting & OTC Quotation

Our common stock was previously listed on The Nasdaq Capital Market (“Nasdaq”). As previously disclosed, our common stock was not in compliance with the requirement under Nasdaq Listing Rule 5550(a)(2) to maintain a minimum bid price of $1.00 per share for continued listing on Nasdaq (the “Bid Price Requirement”), and we had until May 11, 2026, which was the maximum extent of the discretionary authority of the Nasdaq Hearings Panel (the “Panel”).

Having not regained compliance with the Bid Price Requirement by such date, we received a letter from the Panel dated May 12, 2026 indicating that the Panel had determined to delist our common stock from Nasdaq. Our common stock will be suspended from trading on Nasdaq as of the open of trading on May 14, 2026.

Beginning on May 14, 2026, our common stock will be quoted on the OTCQB Venture Market operated by OTC Markets Group Inc. (the "OTCQB Venture Market") under its existing symbol “RVPH.” The above discussed NASDAQ delisting and quotation on the OTCQB Venture Market does not impact the Company's outstanding common stock, warrants, prefunded warrants or stock options.