Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Narrative)

v3.24.2.u1
Summary of Significant Accounting Policies (Details Narrative) - USD ($)
 6 Months Ended
Jun. 30, 2024
Feb. 05, 2024
Feb. 02, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]        
Cash equivalents $ 7,600,000     $ 443,000
Short-term investments     12,893,000
Warrant liability $ 277,000     $ 1,100,000
Revers stock split ratio On February 2, 2024, the Company effectuated a reverse stock-split of its common stock, par value $0.001 per share, at a ratio of 1 for 30. The Company’s common stock began trading on a reverse stock-split-adjusted basis on The Nasdaq Capital Market on February 5, 2024 under the existing trading symbol “GTBP.”      
Common stock, shares outstanding 2,234,328     1,380,633
Common stock, shares authorized 250,000,000     250,000,000
Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Cash, FDIC insured amount $ 250,000      
Common Stock [Member]        
Property, Plant and Equipment [Line Items]        
Common stock, shares outstanding   1,380,633 41,419,000