| Document And Entity Information | 12 Months Ended |
| Dec. 31, 2022 shares | |
| Document Information Line Items | |
| Entity Registrant Name | Alpha Tau Medical Ltd. |
| Trading Symbol | DRTS |
| Document Type | 20-F/A |
| Current Fiscal Year End Date | --12-31 |
| Entity Common Stock, Shares Outstanding | 69,105,000 |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 on Form 20-F/A (the “Amendment”) is being filed by Alpha Tau Medical Ltd. (the “Company”) to amend the Company’s Annual Report on Form 20-F for the fiscal year ended December 31, 2022, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on March 9, 2023 (the “Original Filing”). The Company is filing this Amendment to amend Item 5. Operating and Financial Review and Prospects solely to provide the location of information pertaining to the Company’s Operating and Financial Review and Prospects the year ended December 31, 2020. In addition, as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), new certifications by the Company’s principal executive officer and principal financial officer are filed herewith as exhibits to the Amendment pursuant to Rule 13a-14(a) of the Exchange Act and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350).Except as described above, the Amendment speaks as of the original date of the Original Filing and does not, and does not purport to, amend, update or restate any information set forth in the Original Filing or reflect any events that occurred subsequent to the filing of the Original Filing on March 9, 2023. Accordingly, the Amendment should be read in conjunction with the Original Filing and with any reports furnished by the Company to the SEC subsequent to the Original Filing. |
| Entity Central Index Key | 0001871321 |
| Entity Current Reporting Status | Yes |
| Entity Voluntary Filers | No |
| Entity Filer Category | Accelerated Filer |
| Entity Well-known Seasoned Issuer | No |
| Document Period End Date | Dec. 31, 2022 |
| Document Fiscal Year Focus | 2022 |
| Document Fiscal Period Focus | FY |
| Entity Emerging Growth Company | true |
| Entity Shell Company | false |
| Entity Ex Transition Period | false |
| ICFR Auditor Attestation Flag | false |
| Document Registration Statement | false |
| Document Annual Report | true |
| Document Transition Report | false |
| Document Shell Company Report | false |
| Entity File Number | 001-41316 |
| Entity Incorporation, State or Country Code | L3 |
| Entity Address, Address Line One | Kiryat HaMada St. 5 |
| Entity Address, City or Town | Jerusalem |
| Entity Address, Postal Zip Code | 9777605 |
| Entity Address, Country | IL |
| Auditor Location | Tel-Aviv, Israel |
| Auditor Name | KOST FORER GABBAY & KASIERER |
| Title of 12(b) Security | Ordinary shares, no par value |
| Security Exchange Name | NASDAQ |
| Entity Interactive Data Current | Yes |
| Auditor Firm ID | 1281 |
| Document Accounting Standard | U.S. GAAP |
| Business Contact | |
| Document Information Line Items | |
| Entity Address, Address Line One | Kiryat HaMada St. 5 |
| Entity Address, City or Town | Jerusalem |
| Entity Address, Postal Zip Code | 9777605 |
| Entity Address, Country | IL |
| Contact Personnel Name | Uzi Sofer |
| City Area Code | +972 |
| Local Phone Number | (3) 577-4115 |
