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Document and Entity Information | 9 Months Ended
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Sep. 30, 2020
Cover [Abstract] |
Entity Registrant Name | GT Biopharma, Inc.
Entity Central Index Key | 0000109657
Document Type | S-1/A
Document Period End Date | Sep. 30, 2020
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Amendment Description | To update the document.
Entity Filer Category | Non-accelerated Filer
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Entity Incorporation, State or Country Code | DE

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