| Document and Entity Information | Dec. 15, 2022 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 15, 2022 |
| Entity Registrant Name | Akumin Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39479 |
| Entity Tax Identification Number | 88-4139425 |
| Entity Address, Address Line One | 8300 W. Sunrise Boulevard |
| Entity Address, City or Town | Plantation |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33322 |
| City Area Code | 844 |
| Local Phone Number | 730-0050 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001776197 |
| Amendment Flag | false |
| Common Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | AKU |
| Security Exchange Name | NASDAQ |
| Common Class B [Member] | |
| Document And Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | AKU |
