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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Impairments of long-lived assets	$ 0	$ 0
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	92,268,000	157,898,000
Operating Account
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	14,600,000	2,700,000
Money Market Funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 77,700,000	80,200,000
Government Obligations
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents		$ 75,000,000.0

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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