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Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Tax Credit Carryforward [Line Items] |  |
Foreign income (loss) | $ 9,016,000 | $ 3,686,000
Unrecognized tax benefits | 0 | 0
Penalties and interest accrued related to uncertain tax positions | 0 | 0
Non-capital tax losses | 169,967,000 | 96,495,000
Non-capital tax losses, no expiration | 17,210,000 |
Non-capital tax losses, expire between 2032 and 2038 | 152,757,000 |
Research Tax Credit Carryforward |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforwards | 9,575,000 | 13,148,000
Investment Tax Credit Carryforward |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforwards | 4,179,000 | $ 3,762,000
Foreign |  |
Tax Credit Carryforward [Line Items] |  |
Non-capital tax losses | $ 116,026,000 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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