Achieve Life Sciences, Inc. Annual report pursuant to Section 13 and 15(d)

Common Stock - Summary of Outstanding Warrants (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Oct. 22, 2010
Class of Warrant or Right [Line Items]
Exercise price per unit of warrant		$ 20
Series A Warrants [Member]
Class of Warrant or Right [Line Items]
Total Outstanding and Exercisable	2,779,933
Exercise price per unit of warrant	$ 4.00
Expiration Date	2019-07
Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Total Outstanding and Exercisable	670,269
Exercise price per unit of warrant	$ 4.00
Expiration Date	2019-07
Warrant [Member]
Class of Warrant or Right [Line Items]
Total Outstanding and Exercisable	1,587,301
Exercise price per unit of warrant	$ 20.00
Expiration Date	2015-10
Pre-Funded Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Exercise price per unit of warrant	$ 0.01
Expiration Date	2019-07