| Document and Entity Information | Oct. 15, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 2, 2021 |
| Entity File Number | 001-36464 |
| Entity Registrant Name | Agile Therapeutics, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 23-2936302 |
| Entity Address State Or Province | NJ |
| Entity Address, Address Line One | 101 Poor Farm Road |
| Entity Address, City or Town | Princeton |
| Entity Address, Postal Zip Code | 08540 |
| City Area Code | 609 |
| Local Phone Number | 683-1880 |
| 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 | AGRX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001261249 |
| Amendment Flag | false |
