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Fair Value Measurement and Financial Instruments - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Details) - Money market funds - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Carrying Amount |  |
Assets |  |
Total assets | $ 51,362 | $ 67,650
Fair Value |  |
Assets |  |
Total assets | 51,362 | 67,650
Quoted Prices In Active Markets (Level 1) |  |
Assets |  |
Total assets | $ 51,362 | $ 67,650

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