| Document and Entity Information | Jun. 29, 2023 |
| Cover [Abstract] | |
| Security Exchange Name | NASDAQ |
| Amendment Flag | true |
| Entity Central Index Key | 0001780097 |
| Document Type | 8-K/A |
| Document Period End Date | Jun. 29, 2023 |
| Entity Registrant Name | Baudax Bio, Inc. |
| Entity Incorporation State Country Code | PA |
| Entity File Number | 001-39101 |
| Entity Tax Identification Number | 47-4639500 |
| Entity Address, Address Line One | 490 Lapp Road |
| Entity Address, City or Town | Malvern |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | (484) |
| Local Phone Number | 395-2470 |
| Written Communications | false |
| Soliciting Material | true |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 |
| Trading Symbol | BXRX |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Amendment Description | On July 5, 2023, Baudax Bio, Inc., a Pennsylvania corporation (the “Company”), filed a Current Report on Form 8-K announcing that on June 29, 2023 (the “Effective Date”), the Company had acquired TeraImmune, Inc., a Delaware corporation (“TeraImmune”) pursuant to that certain Agreement and Plan of Merger, dated as of the Effective Date (the “Merger Agreement”) by and among the Company, Bounce Merger Sub I, Inc., a Delaware corporation and a wholly owned subsidiary of the Company (“First Merger Sub”), Bounce Merger Sub II, LLC, a Delaware limited liability company and wholly owned subsidiary of the Company (“Second Merger Sub”), and TeraImmune. This Current Report on Form 8-K/A amends and supplements the Current Report on Form 8-K filed on July 5, 2023 (the “July 2023 Form 8-K”) to provide the pro forma information required by Items 9.01(a) and 9.01(b) of Form 8-K. The text of the July 2023 Form 8-K is incorporated herein by reference. Capitalized terms not otherwise defined herein shall have the respective meanings ascribed to them in the July 2023 Form 8-K. |
