Fair Value Measurement and Financial Instruments - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Details) - Money market funds - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Carrying Amount
Assets
Total assets	$ 59,346	$ 67,650
Fair Value
Assets
Total assets	59,346	67,650
Quoted Prices In Active Markets (Level 1)
Assets
Total assets	$ 59,346	$ 67,650