| Cover | Mar. 26, 2024 |
| Entity Addresses [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 26, 2024 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 1-38519 |
| Entity Registrant Name | AgeX Therapeutics, Inc |
| Entity Central Index Key | 0001708599 |
| Entity Tax Identification Number | 82-1436829 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 601 Genome Way |
| Entity Address, Address Line Two | Suite 2001 |
| Entity Address, City or Town | Huntsville |
| Entity Address, State or Province | AL |
| Entity Address, Postal Zip Code | 35806 |
| City Area Code | (256) |
| Local Phone Number | 327-9630 |
| 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 | SER |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | true |
| Former Address [Member] | |
| Entity Addresses [Line Items] | |
| Entity Address, Address Line One | AgeX Therapeutics, Inc. |
| Entity Address, Address Line Two | 1101 Marina Village Parkway |
| Entity Address, Address Line Three | Suite 201 |
| Entity Address, City or Town | Alameda |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94501 |
