Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 08, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol ACHV  
Entity Registrant Name ACHIEVE LIFE SCIENCES, INC.  
Entity Central Index Key 0000949858  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity File Number 033-80623  
Entity Tax Identification Number 954343413  
Entity Address, Address Line One 1040 West Georgia Street  
Entity Address, Address Line Two Suite 1030  
Entity Address, City or Town Vancouver  
Entity Address, State or Province British Columbia  
Entity Address, Postal Zip Code V6E 4H1  
City Area Code 604  
Local Phone Number 210-2217  
Entity Common Stock, Shares Outstanding   8,097,763