Nature of Operations	9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	1. Nature of operations TerrAscend was incorporated under the Ontario Business Corporations Act on March 7, 2017. TerrAscend provides cannabis products, brands, and services in the United States ("U.S.") and Canada cannabinoid markets where cannabis production or consumption has been legalized for therapeutic or adult use. TerrAscend operates a number of synergistic businesses, including Gage Growth Corp. ("Gage"), a cultivator, processor, and retailer in Michigan; The Apothecarium (“The Apothecarium”), a cannabis dispensary with several retail locations in California, Pennsylvania and New Jersey; TerrAscend NJ, LLC ("TerrAscend NJ"), a cultivator, processor and retailer with operations in New Jersey; Ilera Healthcare (“Ilera”), Pennsylvania’s medical cannabis cultivator, processor and dispenser; HMS Health, LLC and HMS Processing, LLC (collectively “HMS”), a medical cannabis cultivator and processor based in Maryland; Valhalla Confections, a manufacturer of cannabis-infused edibles; State Flower, a California-based cannabis producer operating a licensed cultivation facility in San Francisco; and Arise Bioscience Inc., a manufacturer and distributor of hemp-derived products. Notwithstanding various states in the U.S. which have implemented medical marijuana laws, or which have otherwise legalized the use of cannabis, the use of cannabis remains illegal under US federal law for any purpose, by way of the Controlled Substances Act of 1970. The Company has been listed on the Canadian Stock Exchange since May 3, 2017, having the ticker symbol "TER" and, effective October 22, 2018, the Company began trading on OTCQX under the ticker symbol "TRSSF". The Company’s registered office is located at 3610 Mavis Road, Mississauga, Ontario, L5C 1W2.

Nature of Operations

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Nature of operations

TerrAscend was incorporated under the Ontario Business Corporations Act on March 7, 2017. TerrAscend provides cannabis products, brands, and services in the United States ("U.S.") and Canada cannabinoid markets where cannabis production or consumption has been legalized for therapeutic or adult use. TerrAscend operates a number of synergistic businesses, including Gage Growth Corp. ("Gage"), a cultivator, processor, and retailer in Michigan; The Apothecarium (“The Apothecarium”), a cannabis dispensary with several retail locations in California, Pennsylvania and New Jersey; TerrAscend NJ, LLC ("TerrAscend NJ"), a cultivator, processor and retailer with operations in New Jersey; Ilera Healthcare (“Ilera”), Pennsylvania’s medical cannabis cultivator, processor and dispenser; HMS Health, LLC and HMS Processing, LLC (collectively “HMS”), a medical cannabis cultivator and processor based in Maryland; Valhalla Confections, a manufacturer of cannabis-infused edibles; State Flower, a California-based cannabis producer operating a licensed cultivation facility in San Francisco; and Arise Bioscience Inc., a manufacturer and distributor of hemp-derived products. Notwithstanding various states in the U.S. which have implemented medical marijuana laws, or which have otherwise legalized the use of cannabis, the use of cannabis remains illegal under US federal law for any purpose, by way of the Controlled Substances Act of 1970.

The Company has been listed on the Canadian Stock Exchange since May 3, 2017, having the ticker symbol "TER" and, effective October 22, 2018, the Company began trading on OTCQX under the ticker symbol "TRSSF". The Company’s registered office is located at 3610 Mavis Road, Mississauga, Ontario, L5C 1W2.