Fair Value Disclosure - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment of operating lease right of use assets	$ 900,000
Impairment of long-lived assets		$ 400,000	$ 0
Money Market Fund | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	$ 51,700,000	$ 8,300,000