Convertible Redeemable Preferred Stock and Stockholders’ Equity - Part 3 (Details) - USD ($)												1 Months Ended			12 Months Ended
	Dec. 23, 2025	Aug. 15, 2025	Feb. 24, 2025	Sep. 26, 2024	Jul. 11, 2024	Apr. 16, 2024	Feb. 14, 2024	May 31, 2023	May 09, 2023	Nov. 18, 2022	Nov. 10, 2022	Aug. 31, 2025	Aug. 31, 2024	Jan. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Oct. 31, 2024	Sep. 24, 2024	Dec. 31, 2023	Aug. 02, 2023	Aug. 11, 2022
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Common stock, shares issued															1,560,153	138,422
Common stock shares outstanding															1,560,001	138,270
Purchase aggregate shares					6,580
Number of shares issued					2,193
Contractual term of warrant					5 years
Remaining shares					4,387
Remaining term of contractual					2 years
Net proceeds (in Dollars)					$ 900,000										$ 0
Resale registration statement number of days															60 days
Management fee percentage															1.00%
Non-accountable expenses (in Dollars)															$ 35,000
Shares of common stock															154
Common stock price per share (in Dollars per share)															$ 637.5
Term of common shares															5 years
Aggregate exercise percentage															7.50%
Percentage of common stock															7.00%
Shares of contingent warrants															88
Fair value of the Warrants (in Dollars)	$ 14,900,000
Common stock, percentage															7.00%
Additional paid in capital (in Dollars)															$ 4,371,362
Repurchase shares of common stock											125,000
Price per share (in Dollars per share)										$ 2	$ 1
Repurchases stock (in Dollars)
Deferred offering costs (in Dollars)															225,000
Contingent warrant liabilities (in Dollars)															26,590	43,089
Stock options granted (in Dollars)
Stock Issued During Period, Value, Stock Options Exercised (in Dollars)																163
Restricted shares granted								7	44
Restricted shares granted vest												25.00%	25.00%	50.00%
Shares modified									137
Stock options outstanding						144
Expiration date						Apr. 18, 2026
Expense (in Dollars)															0	58,000
Weighted average exercise price (in Dollars per share)																	$ 294.1
Outstanding stock options (in Dollars)
July 2024 Inducement [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Exercise price, per share (in Dollars per share)																				$ 3,706	$ 8,656.4
PIOs [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Management fee percentage															7.50%
Warrant Inducement [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Legal fees and expenses (in Dollars)															$ 50,000
Additional paid in capital (in Dollars)															$ 158,000
Warrant [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Exercise price, per share (in Dollars per share)															$ 4.97
Shares of contingent warrants															44
Fair value of the Warrants (in Dollars)															$ 14,749,000
Outstanding warrants															461
Warrants purchases															6,401,875
Contingent Warrant Liability [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Fair value of the Warrants (in Dollars)															$ 2,700
Series C PIPE Warrants [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Net proceeds (in Dollars)															20,290	10,200
Warrant liability (in Dollars)															6,300	32,982
Chief Executive Officer [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Restricted shares granted									143
Chief Financial Officer [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Restricted shares granted									44
CBO’s [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Restricted shares granted									22
Board of Directors [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Restricted shares granted		2,472	20	195
Aggregate of stock options							1
Expense (in Dollars)																18,000
Other Current Liabilities [Member] \| Series C PIPE Warrants [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Contingent warrant liabilities (in Dollars)															26,590	43,089
Common Stock [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Net proceeds (in Dollars)															900,000
Equity issuance cost (in Dollars)															1,900,000
Additional paid in capital (in Dollars)
Warrants purchases																		6,040
Stock Issued During Period, Value, Stock Options Exercised (in Dollars)
At the Market Offering Agreement [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Deferred offering costs (in Dollars)															300,000
Subscription Agreement [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Exercise price, per share (in Dollars per share)					$ 510
Equity Option [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Stock Issued During Period, Value, Stock Options Exercised (in Dollars)															$ 10,000.00	$ 700,000
Stock option outstanding shares															23	162			560
Weighted average exercise price (in Dollars per share)															$ 5,700.95	$ 13,258.74			$ 5,542
2022 Plan [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Reserved for issuance shares															17,058
Available shares															7,899
PMX Option Plan [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Expected term															11 years
Stock option outstanding shares																	684
PIOs [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Number of shares issued					6,580
Preferred Investment Options [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Purchase aggregate shares					2,193
Common Stock [Member] \| Onconetix Equity Incentive Plans [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Reserved for issuance shares								926
Minimum [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Resale registration statement number of days															30 days
Maximum [Member]
Convertible Redeemable Preferred Stock and Stockholders’ Equity [Line Items]
Resale registration statement number of days															90 days

Onconetix, Inc. 10-K