Cash Equivalents and Marketable Securities - Additional Information (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) Position	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Sales of available-for-sale marketable securities		$ 0		$ 0
Marketable securities in unrealized loss positions		107,400,000
Aggregate unrealized losses of marketable securities		$ 300,000
Number of investment positions of marketable securities | Position		16
Aggregate net unrealized gains of marketable securities		$ 200,000		$ 100,000
Gross proceeds from sales of short-term and long-term marketable securities		$ 84,761,000	$ 34,410,000
Maximum
Schedule Of Available For Sale Securities [Line Items]
Remaining contractual maturities of long-term marketable securities		2 years
Subsequent Event
Schedule Of Available For Sale Securities [Line Items]
Gross proceeds from sales of short-term and long-term marketable securities	$ 101,900,000
Realized net gain of marketable securities	$ 200,000