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Income Taxes - Canadian federal and provincial income tax rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2018
Income Taxes
Domestic (loss)/gain	$ (10,548)	$ (9,122)
Foreign loss	(13,117)	(8,173)
Loss before income taxes	$ (23,665)	$ (17,295)
Expected statutory rate (recovery)	26.50%	26.50%	34.00%
Expected provision for (recovery of) income tax	$ (6,271)	$ (4,583)
Permanent differences	1,170	993
Change in valuation allowance	4,669	3,086
Effect of foreign exchange rate differences		0
Effect of change in future enacted tax rates		0
Tax credits and other adjustments		0
Effect of tax rate changes and other	432	504
Provision for income taxes	$ 0	$ 0

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The amount of tax impact due to expected provision for recovery of income tax.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of tax credits and other adjustments during the period.

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The amount of tax impact due to permanent difference irreversible in future.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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