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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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