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Marketable Investments - Unrealized Losses on Debt Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | $ 9,260 | $ 11,604
Less than 12 Months - Unrealized Losses | 104 | 153
12 Months or Greater - Market Value | 4,403 | 8,084
12 Months or Greater - Unrealized Losses | 77 | 66
Corporate obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | 7,280 | 9,619
Less than 12 Months - Unrealized Losses | 85 | 139
12 Months or Greater - Market Value | 4,403 | 8,084
12 Months or Greater - Unrealized Losses | 77 | 66
Federal agency obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | 1,980 | 1,985
Less than 12 Months - Unrealized Losses | 19 | 14
12 Months or Greater - Market Value | 0 | 0
12 Months or Greater - Unrealized Losses | $ 0 | $ 0

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
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