DESCRIPTION OF BUSINESS	12 Months Ended
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Miragen Therapeutics, Inc., a Delaware corporation (the “Company” or “miRagen”), is a clinical-stage biopharmaceutical company discovering and developing proprietary RNA-targeted therapies with a specific focus on microRNAs and their role in diseases where there is a high unmet medical need. The Company has three clinical stage product candidates: cobomarsen, remlarsen, and MRG-110. The Company is developing cobomarsen for the treatment of patients with certain cancers that have elevated microRNA-155, including cutaneous T-cell lymphoma and adult T-cell leukemia/lymphoma. Cobomarsen is an inhibitor of microRNA-155, which is found at abnormally high levels in malignant cells of several blood cancers. The Company is also developing remlarsen and MRG-229, which are product candidates being developed for the treatment of patients with pathological fibrosis, including idiopathic pulmonary fibrosis. These product candidates are replacements for microRNA-29 (“miR-29”), which is found at abnormally low levels in a number of pathological fibrotic conditions, including cutaneous, cardiac, renal, hepatic, pulmonary and ocular fibrosis, as well as in systemic sclerosis. MRG-110, an inhibitor of microRNA-92, is the Company’s product candidate for the treatment of heart failure, wound healing, and other ischemic disease. The Company believes its experience in microRNA biology and chemistry, drug discovery, bioinformatics, translational medicine, and drug development allows it to identify and develop microRNA-targeted drugs that are designed to regulate gene pathways to return diseased tissues to a healthy state. The Company believes its drug discovery and development strategy will enable it to progress its product candidates from preclinical discovery to confirmation of mechanism of action in humans quickly and efficiently. The elements of this strategy include identification of mechanistic biomarkers, in early-stage clinical trials to assess target engagement in humans, as well as monitoring outcomes in these early-stage clinical trials to help guide later clinical development. Liquidity The Company has funded its operations to date principally through proceeds received from the sale of the Company’s common stock (“Common Stock”) and other equity securities, debt financings, up-front milestones, and reimbursements received under a license and collaboration agreement. Since its inception and through December 31, 2019, the Company has generated an accumulated deficit of $168.2 million. As of December 31, 2019, the Company had approximately $26.8 million in cash, cash equivalents, and short-term investments. Based on its current operating plans, management believes that the Company’s cash, cash equivalents, and short-term investments, after giving effect to the proceeds received in sales of Common Stock subsequent to December 31, 2019 and through the date of these consolidated financial statements, will be sufficient to fund the Company’s operations into the third quarter of 2021. The Company will continue to require additional capital beyond the third quarter of 2021 to continue its operations. The amount and timing of future funding requirements will depend on many factors, including the pace and results of the Company’s clinical development efforts, equity financings, entering into license and collaboration agreements, and issuing debt or other financing vehicles. The Company’s ability to secure additional capital is dependent upon a number of factors, some of which are outside of the Company’s control, including success in developing its technology and drug product candidates, operational performance, and market conditions.

DESCRIPTION OF BUSINESS

Miragen Therapeutics, Inc., a Delaware corporation (the “Company” or “miRagen”), is a clinical-stage biopharmaceutical company discovering and developing proprietary RNA-targeted therapies with a specific focus on microRNAs and their role in diseases where there is a high unmet medical need. The Company has three clinical stage product candidates: cobomarsen, remlarsen, and MRG-110. The Company is developing cobomarsen for the treatment of patients with certain cancers that have elevated microRNA-155, including cutaneous T-cell lymphoma and adult T-cell leukemia/lymphoma. Cobomarsen is an inhibitor of microRNA-155, which is found at abnormally high levels in malignant cells of several blood cancers. The Company is also developing remlarsen and MRG-229, which are product candidates being developed for the treatment of patients with pathological fibrosis, including idiopathic pulmonary fibrosis. These product candidates are replacements for microRNA-29 (“miR-29”), which is found at abnormally low levels in a number of pathological fibrotic conditions, including cutaneous, cardiac, renal, hepatic, pulmonary and ocular fibrosis, as well as in systemic sclerosis. MRG-110, an inhibitor of microRNA-92, is the Company’s product candidate for the treatment of heart failure, wound healing, and other ischemic disease.

The Company believes its experience in microRNA biology and chemistry, drug discovery, bioinformatics, translational medicine, and drug development allows it to identify and develop microRNA-targeted drugs that are designed to regulate gene pathways to return diseased tissues to a healthy state. The Company believes its drug discovery and development strategy will enable it to progress its product candidates from preclinical discovery to confirmation of mechanism of action in humans quickly and efficiently. The elements of this strategy include identification of mechanistic biomarkers, in early-stage clinical trials to assess target engagement in humans, as well as monitoring outcomes in these early-stage clinical trials to help guide later clinical development.

Liquidity

The Company has funded its operations to date principally through proceeds received from the sale of the Company’s common stock (“Common Stock”) and other equity securities, debt financings, up-front milestones, and reimbursements received under a license and collaboration agreement. Since its inception and through December 31, 2019, the Company has generated an accumulated deficit of $168.2 million. As of December 31, 2019, the Company had approximately $26.8 million in cash, cash equivalents, and short-term investments. Based on its current operating plans, management believes that the Company’s cash, cash equivalents, and short-term investments, after giving effect to the proceeds received in sales of Common Stock subsequent to December 31, 2019 and through the date of these consolidated financial statements, will be sufficient to fund the Company’s operations into the third quarter of 2021.

The Company will continue to require additional capital beyond the third quarter of 2021 to continue its operations. The amount and timing of future funding requirements will depend on many factors, including the pace and results of the Company’s clinical development efforts, equity financings, entering into license and collaboration agreements, and issuing debt or other financing vehicles. The Company’s ability to secure additional capital is dependent upon a number of factors, some of which are outside of the Company’s control, including success in developing its technology and drug product candidates, operational performance, and market conditions.