Nature of Business	3 Months Ended
Mar. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Business	Note 1 - Nature of Business Overview Assembly Biosciences, Inc. (together with its subsidiaries, Assembly or the Company), incorporated in Delaware in October 2005, is a biotechnology company developing innovative antiviral therapeutics with the potential to improve the lives of patients worldwide by targeting serious viral diseases, including high-recurrence genital herpes, transplant-related herpesviruses, chronic hepatitis delta virus (HDV) infection and chronic hepatitis B virus (HBV) infection. The Company operates in one segment and is headquartered in South San Francisco, California. The Company has a broad research and development portfolio with multiple targets, including (1) a long-acting helicase inhibitor for the treatment of high-recurrence genital herpes, (2) a pan-herpes non-nucleoside polymerase inhibitor to treat multiple transplant-associated herpesvirus infections, (3) a small molecule approach to inhibit cell entry for both HDV and HBV, (4) a small molecule interferon-α receptor agonist designed to selectively activate the interferon-α pathway within the liver and offer the convenience of oral dosing and (5) small molecule core inhibitors that inhibit the HBV replication cycle and block the generation of covalently closed circular DNA (cccDNA). Liquidity The Company has not derived any revenue from product sales to date and currently has no approved products. Once a product has been developed, it will need to be approved for sale by the U.S. Food and Drug Administration (FDA) or an applicable foreign regulatory agency. Since inception, the Company’s operations have been financed primarily through the sale of equity securities, the proceeds from the exercise of warrants and stock options, the issuance of debt, and upfront payments related to collaboration agreements. The Company has incurred losses from operations since inception and expects to continue to incur substantial losses for the next several years as it continues its product development efforts. Management believes the Company currently has sufficient funds to meet its operating requirements for at least the next twelve months following the date these unaudited condensed consolidated financial statements are issued. If the Company cannot generate significant cash from its operations, it intends to obtain any additional funding it requires through strategic relationships, public or private equity or debt financings, grants or other arrangements. The Company cannot assure such funding will be available on reasonable terms, if at all. Market volatility, inflation or other factors could also adversely impact the Company’s ability to access capital when and as needed. If the Company is unable to secure additional sources of funding, generate enough revenue from its collaborations, or receive full and timely collections of amounts due, it may be necessary to significantly reduce the current rate of spending through reductions in staff and delaying, scaling back, or stopping certain research and development programs, including more costly clinical trials.

Nature of Business

3 Months Ended

Mar. 31, 2023

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1 - Nature of Business

Overview

Assembly Biosciences, Inc. (together with its subsidiaries, Assembly or the Company), incorporated in Delaware in October 2005, is a biotechnology company developing innovative antiviral therapeutics with the potential to improve the lives of patients worldwide by targeting serious viral diseases, including high-recurrence genital herpes, transplant-related herpesviruses, chronic hepatitis delta virus (HDV) infection and chronic hepatitis B virus (HBV) infection. The Company operates in one segment and is headquartered in South San Francisco, California.

The Company has a broad research and development portfolio with multiple targets, including (1) a long-acting helicase inhibitor for the treatment of high-recurrence genital herpes, (2) a pan-herpes non-nucleoside polymerase inhibitor to treat multiple transplant-associated herpesvirus infections, (3) a small molecule approach to inhibit cell entry for both HDV and HBV, (4) a small molecule interferon-α receptor agonist designed to selectively activate the interferon-α pathway within the liver and offer the convenience of oral dosing and (5) small molecule core inhibitors that inhibit the HBV replication cycle and block the generation of covalently closed circular DNA (cccDNA).

Liquidity

The Company has not derived any revenue from product sales to date and currently has no approved products. Once a product has been developed, it will need to be approved for sale by the U.S. Food and Drug Administration (FDA) or an applicable foreign regulatory agency. Since inception, the Company’s operations have been financed primarily through the sale of equity securities, the proceeds from the exercise of warrants and stock options, the issuance of debt, and upfront payments related to collaboration agreements. The Company has incurred losses from operations since inception and expects to continue to incur substantial losses for the next several years as it continues its product development efforts. Management believes the Company currently has sufficient funds to meet its operating requirements for at least the next twelve months following the date these unaudited condensed consolidated financial statements are issued. If the Company cannot generate significant cash from its operations, it intends to obtain any additional funding it requires through strategic relationships, public or private equity or debt financings, grants or other arrangements. The Company cannot assure such funding will be available on reasonable terms, if at all. Market volatility, inflation or other factors could also adversely impact the Company’s ability to access capital when and as needed.

If the Company is unable to secure additional sources of funding, generate enough revenue from its collaborations, or receive full and timely collections of amounts due, it may be necessary to significantly reduce the current rate of spending through reductions in staff and delaying, scaling back, or stopping certain research and development programs, including more costly clinical trials.