Marketable Securities - Schedule of Fair Value and Amortized Cost of Company's Available-for-Sale Securities by Contractual Maturity (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Investments Debt And Equity Securities [Abstract]
Due in one year or less, Fair Value	$ 57,699
Total, Fair Value	57,699
Due in one year or less, Amortized Cost	57,650
Total, Amortized Cost	$ 57,650