Senior Facility - Schedule of Interest Expenses Recognized Related to Senior Facility (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Amortization of discount on convertible notes	$ 1,653	$ 2,597
Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Contractual interest at Canadian prime plus 8.05%	1,325	480
Amortization of discount on convertible notes	436	131
Total	$ 1,761	$ 611

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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