Fair Value Measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial and nonfinancial liabilities measured at fair value	$ 0	$ 0
Nonfinancial assets measured at fair value	0	0
Recurring basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total	51,814	82,411
Recurring basis | Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total	51,814	82,411
Recurring basis | Money market funds
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total	51,814	82,411
Recurring basis | Money market funds | Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total	$ 51,814	$ 82,411