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Segment and Geographical Information - Long-lived Assets (Details) - Geographic Concentration Risk - Net Assets, Geographic Area - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | $ 61,612 | $ 50,360
Long-lived assets (as a percent) | 100.00% | 100.00%
Canada |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | $ 58,460 | $ 40,309
Long-lived assets (as a percent) | 94.90% | 80.00%
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | $ 1,593 | $ 9,633
Long-lived assets (as a percent) | 2.60% | 19.20%
Rest of World |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Long-lived assets | $ 1,559 | $ 418
Long-lived assets (as a percent) | 2.50% | 0.80%

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 + Details
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