13. Subsequent Events (Details Narrative) - Subsequent Event [Member] - USD ($) $ in Millions		1 Months Ended
	Jul. 11, 2022	Apr. 30, 2022	Apr. 29, 2022
Subsequent Event [Line Items]
Business Combination, Separately Recognized Transactions, Description			On April 8, 2022, Seelos Corporation (“STI”), a wholly-owned subsidiary of the Company, and Phoenixus AG f/k/a Vyera Pharmaceuticals AG (“Vyera”), entered into an amendment (the “Amendment”) to the Asset Purchase Agreement by and between STI and Vyera, dated March 6, 2018 (as amended by a first amendment thereto entered into on May 18, 2018, a second amendment thereto entered into on December 31, 2018, a third amendment thereto entered into on October 15, 2019 and a fourth amendment thereto entered into on February 15, 2021, the “Vyera Purchase Agreement”). Pursuant to the Vyera Purchase Agreement, STI acquired the assets and liabilities of Vyera related to a product candidate currently referred to as SLS-002 (intranasal ketamine) (the “Vyera Assets”) and agreed, among other things, to make certain development and commercialization milestone payments and royalty payments related to the Vyera Assets (the “Milestone and Royalty Payment Obligations”) and further agreed that in the event that the Company sold, directly or indirectly, all or substantially all of the Vyera Assets to a third party, then the Company would pay Vyera an amount equal to 4% of the net proceeds actually received by the Company as an upfront payment in such sale (the “Change of Control Payment Obligation”).
Subsequent Event, Description		Pursuant to the Vyera Purchase Agreement, as amended by the Amendment, STI agreed to (i) make a cash payment to Vyera in the aggregate amount of $4.0 million on or before April 8, 2022; (ii) issue to Vyera on or before April 11, 2022 500,000 shares of the Company’s common stock, (the “Initial Shares”); (iii) issue to Vyera on or before July 11, 2022 an additional 500,000 shares of the Company’s common stock (as adjusted for stock splits, stock dividends, combinations, recapitalizations and the like) (the “July 2022 Shares”); and (iv) issue to Vyera on or before January 11, 2023 an additional number of shares of the Company’s common stock equal to $1.0 million divided by the volume weighted average closing price of the Company’s common stock for the ten consecutive trading days ending on the fifth trading day prior to the applicable date of issuance of the shares of the Company’s common stock (the “January 2023 Shares”, and together with the Cash Payment, the Initial Shares and the July 2022 Shares, “Final Payments”). In consideration for the Final Payments, all of STI’s contingent payment obligations under the Vyera Purchase Agreement, including the Milestone and Royalty Payment Obligations and the Change of Control Payment Obligation, as well as all commercialization covenants of STI under the Vyera Purchase Agreement, will terminate in full upon the date that all of the Final Payments have been made.
Assetsfrom Vyera Pharmaceuticals [Member]
Subsequent Event [Line Items]
[custom:CashPaymentsAgreedtoinAmendmenttotheAssetPurchaseAgreement]		$ 4.0
Stock Issued During Period, Shares, New Issues	500,000	500,000