Financial Instruments and Risk Management - Key Inputs and Assumptions Used in Black Scholes Simulation Valuation Model (Details)		6 Months Ended	12 Months Ended
	Mar. 10, 2022 USD ($) $ / shares	Jun. 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. | $		2.28	6.11
Warrant exercise price | $ / shares		$ 3,000	$ 3,000
Warrant conversion ratio		10	10
Annual volatility		65.70%	65.50%
Annual risk-free rate		2.90%	0.60%
Expected term (in years)		10 months 24 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. | $	5.70	2.28
Warrant exercise price | $ / shares	$ 8.66	$ 8.66
Annual risk-free rate	1.80%	2.90%
Expected term (in years)	1 year 8 months 12 days	1 year 6 months
Gage Warrant | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Annual volatility	61.65%	62.88%
Gage Warrant | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Annual volatility	61.87%	63.73%