Financial Instruments and Risk Management - Key Inputs and Assumptions Used in Black Scholes Simulation Valuation Model (Details)		9 Months Ended	12 Months Ended
	Mar. 10, 2022 USD ($) $ / shares	Sep. 30, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares
Private Placement Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Common Stock Price of TerrAscend Corp. | $		1.28	6.11
Warrant exercise price | $ / shares		$ 3,000	$ 3,000
Warrant conversion ratio		10	10
Annual volatility		73.30%	65.50%
Annual risk-free rate		4.00%	0.60%
Expected term (in years)		7 months 6 days	1 year 4 months 24 days
Gage Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Common Stock Price of TerrAscend Corp. | $	4.92	1.28
Warrant exercise price | $ / shares	$ 8.66	$ 8.66
Annual volatility	65.00%
Annual risk-free rate	1.70%	4.20%
Expected term (in years)	2 years	1 year 3 months 18 days
Gage Warrant | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Annual volatility		69.72%
Gage Warrant | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Annual volatility		70.19%