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Income Taxes - Summary of Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (108,586)	$ (54,742)	$ (27,021)
Income tax at statutory rate	26.50%	26.50%	26.50%
Computed income tax recovery	$ (28,775)	$ (14,507)	$ (7,160)
Federal investment tax credit	(4,093)	(2,347)	(985)
Accounting charges not deductible for tax purposes	1,078	1,088	143
Equity compensation	2,220	(742)	134
Other	644	(306)	(16)
Change in valuation allowance	27,248	15,489	8,079
Tax (benefit) expense	$ (1,678)	$ (1,325)	$ 195

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Income tax rate reconciliation, nondeductible expense, accounting charges.

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