Cover |
Nov. 01, 2021 |
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| Cover [Abstract] | |
| Entity Registrant Name | GT Biopharma, Inc. |
| Entity Central Index Key | 0000109657 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Document Period End Date | Nov. 01, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-40023 |
| Entity Tax Identification Number | 94-1620407 |
| Entity Address Address Line 1 | 9350 Wilshire Blvd. |
| Entity Address Address Line 2 | Suite 203 |
| Entity Address City Or Town | Beverly Hills |
| Entity Address State Or Province | CA |
| Entity Address Postal Zip Code | 90212 |
| City Area Code | 800 |
| Local Phone Number | 304-9888 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, $0.001 par value |
| Trading Symbol | GTBP |
| Security Exchange Name | NASDAQ |
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