| Cover | May 10, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Entity Registrant Name | SmileDirectClub, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39037 |
| Entity Tax Identification Number | 83-4505317 |
| Entity Address, Address Line One | 414 Union Street |
| Entity Address, City or Town | Nashville, |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37219 |
| City Area Code | 800 |
| Local Phone Number | 848-7566 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Title of 12(b) Security | Class A common stock, par value $.0001 per share |
| Trading Symbol | SDC |
| Security Exchange Name | NASDAQ |
| Amendment Flag | false |
| Entity Central Index Key | 0001775625 |
