Summary of Significant Accounting Policies - Investments (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 98,584,000	$ 249,159,000
Short-term investments	17,914,000	0
Cash and cash equivalents and short-term investments		$ 0
Realized gains (losses)	1,100,000
Unrealized gain (loss)	200,000
Held to Maturity Investment
Cash and Cash Equivalents [Line Items]
Short-term investments	17,900,000
Commercial Paper
Cash and Cash Equivalents [Line Items]
Short-term investments	10,000,000
U.S. Agency Bonds
Cash and Cash Equivalents [Line Items]
Short-term investments	7,900,000
Held to Maturity Investment
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	12,000,000
U.S. Treasury Securities
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	6,000,000
U.S. Agency Bonds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 6,000,000

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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