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Summary of Significant Accounting Policies - Investments Narrative (Details) - Makespace - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Aggregate cost		$ 36,000
Ownership percentage	37.00%		34.00%
Equity investments	$ 15,801		$ 18,570
Joint Venture With MakeSpace, Labs Inc.
Schedule of Equity Method Investments [Line Items]
Aggregate cost		$ 45,000

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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