Organization	9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]
Organization	1. Organization Design Therapeutics, Inc. (the “Company”) was incorporated in Delaware in December 2017 and is based in Carlsbad, California. The Company is a biopharmaceutical company pioneering GeneTACTM molecules, a novel class of disease-modifying small-molecule gene targeted chimera therapeutics that are designed to target the underlying cause of inherited nucleotide repeat expansion diseases. The Company’s lead product candidate is in Friedreich ataxia (“FA”), its second GeneTAC™ program is in myotonic dystrophy type-1 (“DM1”), and it is also advancing its GeneTACTM portfolio to address other serious nucleotide repeat-driven monogenic diseases. The Company has experienced net losses and negative cash flows from operating activities since inception and expects to incur net losses for the foreseeable future as it advances its research and development programs, conducts clinical trials for any future product candidates and commercializes any such product candidates for which it receives regulatory approval. As the Company continues to incur losses, its transition to profitability will depend on the successful development, approval and commercialization of its future product candidates, and on the achievement of sufficient revenue to support its cost structure. The Company may never achieve profitability, and unless and until it does, it will need to continue to raise additional capital to fund its operations.

Organization

9 Months Ended

Sep. 30, 2021

1. Organization

Design Therapeutics, Inc. (the “Company”) was incorporated in Delaware in December 2017 and is based in Carlsbad, California. The Company is a biopharmaceutical company pioneering GeneTACTM molecules, a novel class of disease-modifying small-molecule gene targeted chimera therapeutics that are designed to target the underlying cause of inherited nucleotide repeat expansion diseases. The Company’s lead product candidate is in Friedreich ataxia (“FA”), its second GeneTAC™ program is in myotonic dystrophy type-1 (“DM1”), and it is also advancing its GeneTACTM portfolio to address other serious nucleotide repeat-driven monogenic diseases.

The Company has experienced net losses and negative cash flows from operating activities since inception and expects to incur net losses for the foreseeable future as it advances its research and development programs, conducts clinical trials for any future product candidates and commercializes any such product candidates for which it receives regulatory approval. As the Company continues to incur losses, its transition to profitability will depend on the successful development, approval and commercialization of its future product candidates, and on the achievement of sufficient revenue to support its cost structure. The Company may never achieve profitability, and unless and until it does, it will need to continue to raise additional capital to fund its operations.