Note 1 - Organization and Basis of Presentation	12 Months Ended
Dec. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Organization and Basis of Presentation Description of Business SIGA Technologies, Inc. (“SIGA” or the “Company”) is a commercial-stage pharmaceutical company. The Company sells its lead product, TPOXX® (“oral TPOXX®,” also known as "tecovirimat" in certain international markets), to the U.S. government and international governments (including government affiliated entities). Additionally, the Company sells the intravenous formulation of TPOXX® ("IV TPOXX®") to the U.S. government. TPOXX® is an oral formulation antiviral drug for the treatment of human smallpox disease caused by variola virus. On July 13, 2018, the United States Food & Drug Administration (“FDA”) approved oral TPOXX® for the treatment of smallpox. The Company has been delivering oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile") since 2013. In connection with IV TPOXX®, SIGA announced on May 19, 2022 that the FDA approved this formulation for the treatment of smallpox. In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has regulatory approval with the European Medicines Agency ("EMA"), Health Canada and the Medicines and Healthcare Products Regulatory Agency ("MHRA") of the United Kingdom. The EMA and MHRA approved label indication covers the treatment of smallpox, monkeypox ("mpox"), cowpox, and vaccinia complications following vaccination against smallpox. The Health Canada approved label indication covers the treatment of smallpox. With respect to the regulatory approvals by the EMA, MHRA and Health Canada, oral tecovirimat represents the same formulation that was approved by the FDA in July 2018 under the brand name TPOXX®.

Note 1 - Organization and Basis of Presentation

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. Organization and Basis of Presentation

Description of Business

SIGA Technologies, Inc. (“SIGA” or the “Company”) is a commercial-stage pharmaceutical company. The Company sells its lead product, TPOXX® (“oral TPOXX®,” also known as "tecovirimat" in certain international markets), to the U.S. government and international governments (including government affiliated entities). Additionally, the Company sells the intravenous formulation of TPOXX® ("IV TPOXX®") to the U.S. government.

TPOXX® is an oral formulation antiviral drug for the treatment of human smallpox disease caused by variola virus. On July 13, 2018, the United States Food & Drug Administration (“FDA”) approved oral TPOXX® for the treatment of smallpox. The Company has been delivering oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile") since 2013.

In connection with IV TPOXX®, SIGA announced on May 19, 2022 that the FDA approved this formulation for the treatment of smallpox.

In addition to being approved by the FDA, oral TPOXX® (tecovirimat) has regulatory approval with the European Medicines Agency ("EMA"), Health Canada and the Medicines and Healthcare Products Regulatory Agency ("MHRA") of the United Kingdom. The EMA and MHRA approved label indication covers the treatment of smallpox, monkeypox ("mpox"), cowpox, and vaccinia complications following vaccination against smallpox. The Health Canada approved label indication covers the treatment of smallpox.

With respect to the regulatory approvals by the EMA, MHRA and Health Canada, oral tecovirimat represents the same formulation that was approved by the FDA in July 2018 under the brand name TPOXX®.