v3.25.2
Cover
Jun. 23, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 23, 2025
Entity File Number 001-37990
Entity Registrant Name Leap Therapeutics, Inc.
Entity Central Index Key 0001509745
Entity Tax Identification Number 27-4412575
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 47 Thorndike Street
Entity Address, Address Line Two Suite B1-1
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02141
City Area Code 617
Local Phone Number 714-0360
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001
Trading Symbol LPTX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false