Financial Instruments and Risk Management - Key Inputs and Assumptions Used in Black Scholes Simulation Valuation Model (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Common Stock Price of TerrAscend Corp. | $	5.70	6.11
Warrant exercise price | $ / shares	$ 3,000	$ 3,000
Warrant conversion ratio	10	10
Annual volatility	60.90%	65.50%
Annual risk-free rate	2.20%	0.60%
Expected term (in years)	1 year 2 months 12 days	1 year 4 months 24 days