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 | |