Fair Value Measurements - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Realized gains or losses on sales of marketable securities	$ 0
Unrealized loss position for 12 months or greater on security	$ 0
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Long-term marketable debt securities maturity period	13 months
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Long-term marketable debt securities maturity period	14 months
Long-term Investments
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, aggregate cost basis	$ 6,100,000
Debt securities, fair value	$ 6,100,000