Fair Value Measurements - Additional Information (Details) - USD ($)	6 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Impairment charges	$ 0
Level 2
Business Acquisition [Line Items]
Fair value of convertible notes	$ 141,023,000	$ 149,934,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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