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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Federal statutory tax rate of Canada	27.00%	27.00%	26.00%
Federal statutory tax rate of United States	21.00%	21.00%	34.00%
Effective tax rate	165.60%	23.40%	13.80%
Valuation allowance	$ 30	$ 504	$ 607
Net operating losses carry forwards	$ 48,285	24,340
Operating loss carry forwards, expiration year	2031
Uncertain tax benefits	$ 0	0
Income Tax Penalties and Interest	0	0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses carry forwards	$ 12,572	7,711
Operating loss carry forwards, expiration year	2020
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses carry forwards	$ 1,770	$ 408
Operating loss carry forwards, expiration year	2027

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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