v3.19.2
Document and Entity Information
Aug. 07, 2019
Cover [Abstract]  
Entity Registrant Name G1 Therapeutics, Inc.
Amendment Flag false
Entity Central Index Key 0001560241
Document Type 8-K
Document Period End Date Aug. 07, 2019
Entity Incorporation State Country Code DE
Entity File Number 001-38096
Entity Tax Identification Number 26-3648180
Entity Address, Address Line One 79 T.W. Alexander Drive
Entity Address, Address Line Two 4501 Research Commons
Entity Address, Address Line Three Suite 100
Entity Address, City or Town Research Triangle Park
Entity Address, State or Province NC
Entity Address, Postal Zip Code 27709
City Area Code (919)
Local Phone Number 213-9835
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, $0.0001 par value
Trading Symbol GTHX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false