Avenue Therapeutics, Inc. Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements - Inputs (Details)	Sep. 30, 2023	Jan. 31, 2023	Dec. 31, 2022
Measurement Input, Share Price [Member] \| October 2022 Warrants [Member]
Warrant Liability	0.71		1.16
Measurement Input, Share Price [Member] \| January 2023 Warrants [Member]
Warrant Liability	0.71	1.38
Measurement Input, Risk Free Interest Rate [Member] \| October 2022 Warrants [Member]
Warrant Liability	0.046		0.0402
Measurement Input, Risk Free Interest Rate [Member] \| January 2023 Warrants [Member]
Warrant Liability	0.0503	0.039
Measurement Input, Expected Dividend Rate [Member] \| October 2022 Warrants [Member]
Warrant Liability	0		0
Measurement Input, Expected Dividend Rate [Member] \| January 2023 Warrants [Member]
Warrant Liability	0	0
Measurement Input, Expected Term [Member] \| October 2022 Warrants [Member]
Warrant Liability	4		4.8
Measurement Input, Expected Term [Member] \| January 2023 Warrants [Member]
Warrant Liability	2.4	3
Measurement Input, Price Volatility [Member] \| October 2022 Warrants [Member]
Warrant Liability	1.41		0.93
Measurement Input, Price Volatility [Member] \| January 2023 Warrants [Member]
Warrant Liability	1.65	1.60