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Marketable Investments - Unrealized Losses on Debt Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | $ 11,604 | $ 18,509
Less than 12 Month - Unrealized Losses | 153 | 33
12 Months or Greater - Market Value | 8,084 | 0
12 Months or Greater - Unrealized Losses | 66 | 0
Corporate Obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | 9,619 | 18,509
Less than 12 Month - Unrealized Losses | 139 | 33
12 Months or Greater - Market Value | 8,084 | 0
12 Months or Greater - Unrealized Losses | 66 | $ 0
Federal Agency Obligation |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 Months - Market Value | 1,985 |
Less than 12 Month - Unrealized Losses | 14 |
12 Months or Greater - Market Value | 0 |
12 Months or Greater - Unrealized Losses | $ 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on 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 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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