Cash Equivalents and Short-Term Investments - Additional Information (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Cash And Cash Equivalents [Line Items]
Cash equivalents, Fair Value		$ 41,381,000
Money Market Funds
Cash And Cash Equivalents [Line Items]
Cash equivalents, Fair Value	$ 213,300,000	$ 29,386,000
Cash equivalents Unrealized Gains	0
Cash equivalents Unrealized Losses	$ 0

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant