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Cash, Cash Equivalents, Marketable Securities, and Restricted Cash - Components (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Cash, Money Market Funds, and Marketable Securities |  |  |
Cash and cash equivalents | $ 263,320 | $ 148,813 | $ 277,592
Fair value, cash balances | 263,320 | 148,813 |
Cost, available-for-sale securities | 16,977 | 144,700 |
Gross unrealized gain, available-for-sale securities | 3 | 82 |
Gross unrealized loss, available-for-sale securities | 0 | 0 |
Fair value, available-for-sale debt securities | 16,980 | 144,782 |
Cost, cash balances and available-for-sale securities | 280,297 | 293,513 |
Gross unrealized gain, cash balances and available-for-sale securities | 3 | 82 |
Gross unrealized loss, cash balances and available-for-sale securities | 0 | 0 |
Fair value, cash balances and available-for-sale securities | 280,300 | 293,595 |
Commercial paper |  |  |
Cash, Money Market Funds, and Marketable Securities |  |  |
Cost, available-for-sale securities | 16,826 | 144,299 |
Gross unrealized gain, available-for-sale securities | 3 | 82 |
Gross unrealized loss, available-for-sale securities | 0 | 0 |
Fair value, available-for-sale debt securities | 16,829 | 144,381 |
Money market |  |  |
Cash, Money Market Funds, and Marketable Securities |  |  |
Cost, available-for-sale securities | 100 | 350 |
Gross unrealized gain, available-for-sale securities | 0 | 0 |
Fair value, available-for-sale debt securities | 100 | 350 |
Gross unrealized loss, cash balances and available-for-sale securities | 0 | 0 |
Certificates of deposit |  |  |
Cash, Money Market Funds, and Marketable Securities |  |  |
Cost, available-for-sale securities | 51 | 51 |
Gross unrealized gain, available-for-sale securities | 0 | 0 |
Fair value, available-for-sale debt securities | 51 | 51 |
Gross unrealized loss, cash balances and available-for-sale securities | $ 0 | $ 0 |

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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Also includes amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash and cash equivalents and marketable securities. + References No definition available. + Details
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-4 + Details
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