| Document And Entity Information | Dec. 13, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 13, 2022 |
| Entity Registrant Name | LM FUNDING AMERICA, INC. |
| Entity Central Index Key | 0001640384 |
| Entity Emerging Growth Company | false |
| Securities Act File Number | 001-37605 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 47-3844457 |
| Entity Address, Address Line One | 1200 West Platt Street |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Tampa |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33606 |
| City Area Code | 813 |
| Local Phone Number | 222-8996 |
| 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 $0.001 per share |
| Trading Symbol | LMFA |
| Security Exchange Name | NASDAQ |
