| Cover - USD ($) | 12 Months Ended | | |
| Dec. 31, 2023 | Apr. 08, 2024 | Jun. 30, 2023 |
| Cover [Abstract] | | | |
| Entity Registrant Name | ASP Isotopes Inc. | | |
| Entity Central Index Key | 0001921865 | | |
| Document Type | 10-K/A | | |
| Amendment Flag | true | | |
| Entity Voluntary Filers | No | | |
| Current Fiscal Year End Date | --12-31 | | |
| Entity Well Known Seasoned Issuer | No | | |
| Entity Small Business | true | | |
| Entity Shell Company | false | | |
| Entity Emerging Growth Company | true | | |
| Entity Current Reporting Status | Yes | | |
| Document Period End Date | Dec. 31, 2023 | | |
| Entity Filer Category | Non-accelerated Filer | | |
| Document Fiscal Period Focus | FY | | |
| Document Fiscal Year Focus | 2023 | | |
| Entity Ex Transition Period | false | | |
| Entity Common Stock Shares Outstanding | | 48,923,276 | |
| Entity Public Float | | | $ 10.2 |
| Document Annual Report | true | | |
| Document Transition Report | false | | |
| Document Fin Stmt Error Correction Flag | false | | |
| Entity File Number | 001-39069 | | |
| Entity Incorporation State Country Code | DE | | |
| Entity Tax Identification Number | 87-2618235 | | |
| Entity Address Address Line 1 | 1101 Pennsylvania Avenue NW | | |
| Entity Address Address Line 2 | Suite 300 | | |
| Entity Address City Or Town | Washington | | |
| Entity Address State Or Province | DC | | |
| Entity Address Postal Zip Code | 20004 | | |
| City Area Code | 202 | | |
| Amendment Description | ASP Isotopes Inc. (“ASP Isotopes,” the “Company,” “we,” “us,” or “our”) is filing this Amendment No. 2 on Form 10-K/A (this “Amendment No.2”) to our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, originally filed with the Securities and Exchange Commission (the “SEC”) on April 10, 2024 (the “Original Filing”), as amended by Amendment No.1 thereto filed with the SEC on April 29, 2024 (“Amendment No.1”), to amend and restate Part II “Item 9A: Controls and Procedures” solely to revise Management’s Annual Report on Internal Controls Over Financial Reporting in order to correct a typographical error to state that, based on management’s evaluation, the Company’s internal control over financial reporting was not effective as of the end of the period covered by the Original Filing due to the material weaknesses previously disclosed in the Original Filing. This Amendment No.2 contains only an updated cover page, this explanatory note, the complete text of Item 9A, the exhibit list, a signature page and the certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Except as described above, this Amendment No.2 does not amend any other information set forth in the Original Filing, and the Company has not updated disclosures included therein to reflect any subsequent events. Accordingly, this Amendment No.2 should be read in conjunction with our Original Filing, Amendment No.1 and with our other filings with the SEC subsequent to the Original Filing. | | |
| Icfr Auditor Attestation Flag | false | | |
| Local Phone Number | 756-2245 | | |
| Security 12b Title | Common stock, par value $0.01 per share | | |
| Trading Symbol | ASPI | | |
| Security Exchange Name | NASDAQ | | |
| Entity Interactive Data Current | Yes | | |
