Cash Equivalents and Marketable Securities - Additional Information (Details) - US Government Agencies Debt Securities $ in Thousands			6 Months Ended
	Jun. 30, 2020 USD ($) Security	Dec. 31, 2019 USD ($) Security	Jun. 30, 2020 USD ($) Security	Jun. 30, 2019 USD ($)
Cash Equivalents And Marketable Securities [Line Items]
Number of debt securities held | Security	11	13	11
Allowance for Credit Loss	$ 0	$ 0	$ 0
Impairment of marketable securities	0	0
Realized gains or losses on marketable securities			0	$ 0
Accrued interest receivable on available-for-sale debt securities	$ 100	$ 300	$ 100