    <SEC-DOCUMENT>0000950170-25-059297-index.html : 20250428
    <SEC-HEADER>0000950170-25-059297.hdr.sgml : 20250428
    <ACCEPTANCE-DATETIME>20250428160905
    ACCESSION NUMBER:		0000950170-25-059297
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20250428
    FILED AS OF DATE:		20250428
    DATE AS OF CHANGE:		20250428

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ACHIEVE LIFE SCIENCES, INC.
    		CENTRAL INDEX KEY:			0000949858
    		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
    		ORGANIZATION NAME:           	03 Life Sciences
    		EIN:				954343413
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	033-80623
    		FILM NUMBER:		25880382

    	BUSINESS ADDRESS:
    		STREET 1:		22722 29TH DR. SE
    		STREET 2:		SUITE 100
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98021
    		BUSINESS PHONE:		425-686-1500

    	MAIL ADDRESS:
    		STREET 1:		22722 29TH DR. SE
    		STREET 2:		SUITE 100
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98021

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ONCOGENEX PHARMACEUTICALS, INC.
    		DATE OF NAME CHANGE:	20080821

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	SONUS PHARMACEUTICALS INC
    		DATE OF NAME CHANGE:	19950825
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>achv-20250424.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: achv-20250424.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img228350020_0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img228350020_0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img228350020_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img228350020_1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>img228350020_2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: img228350020_2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>img228350020_3.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: img228350020_3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>img228350020_4.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: img228350020_4.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>img228350020_5.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: img228350020_5.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>8
    <FILENAME>achv-20250424.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
    <TEXT>
    Document 8 - file: achv-20250424.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>10
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>R4.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: R4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: FilingSummary.html

    Document 17 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>19
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>20
    <FILENAME>0000950170-25-059297-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: 0000950170-25-059297-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>achv-20250424_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: achv-20250424_htm.html

    Document 21 - RAW XML: achv-20250424_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>