| Cover | Dec. 11, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 11, 2023 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-36754 |
| Entity Registrant Name | EVOFEM BIOSCIENCES, INC. |
| Entity Central Index Key | 0001618835 |
| Entity Tax Identification Number | 20-8527075 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 7770 Regents Road |
| Entity Address, Address Line Two | Suite 113-618 |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92122 |
| City Area Code | (858) |
| Local Phone Number | 550-1900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | EVFM |
| Entity Emerging Growth Company | false |
