v3.26.1
Convertible Preferred Stock and Stockholders’ Equity - Part 3 (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
May 21, 2026
Nov. 18, 2022
Nov. 10, 2022
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2025
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Common stock, shares issued       3,793,676   3,793,676   31,201 31,201
Common stock shares outstanding       3,793,673   3,793,673   31,198 31,198
Repurchase shares of common stock     125,000            
Price per share (in Dollars per share)   $ 2 $ 1            
Repurchases stock (in Dollars)              
Contingent warrant liabilities (in Dollars)       $ 25,378   25,378   $ 26,590 $ 26,590
Outstanding stock options (in Dollars)              
Trading days 16 years                
Equity Option [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Stock options granted (in Dollars)          
Stock options vested (in Dollars)       $ 0 $ 46,000 $ 0 $ 92,000    
Warrant [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Warrants purchases       24,212,655   24,212,655      
Exercise price, per share (in Dollars per share) $ 0.9716     $ 1.27   $ 1.27      
Series C Warrants [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Warrant liability (in Dollars)       $ 5,100   $ 5,100   6,300 6,300
Net proceeds (in Dollars)           20,278     20,290
Contingent warrant liabilities (in Dollars)       $ 25,378   $ 25,378   $ 26,590 $ 26,590
Series D and E Warrants [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Warrants purchases       24,212,379   24,212,379      
Onconetix Equity Incentive Plans [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Stock options granted (in Dollars)                
2022 Plan [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Reserved for issuance shares       341   341      
Available shares       208   208      
PMX Option Plan [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Expected term           11 years      
Common Stock [Member] | Onconetix Equity Incentive Plans [Member]                  
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]                  
Reserved for issuance shares       18   18