| Document and Entity Information | Nov. 12, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 12, 2021 |
| Entity File Number | 001-39343 |
| Entity Registrant Name | Akouos, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 81-1716654 |
| Entity Address State Or Province | MA |
| Entity Address, Address Line One | 645 Summer Street |
| Entity Address, Adress Line Two | Suite 200 |
| Entity Address, City or Town | Boston |
| Entity Address, Postal Zip Code | 02210 |
| City Area Code | 857 |
| Local Phone Number | 410-1818 |
| Title of 12(b) Security | Common stock, $0.0001 par value per share |
| Trading Symbol | AKUS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001722271 |
| Amendment Flag | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
