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Short-term Investments and Fair Value Measurements - Narrative (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($) position shares | Mar. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |
Realized gain on investments | $ 20 | $ 0
Realized loss on investments | 339 | 10
Unrealized loss | $ 4,800 | $ 848
Number of securities in a gross unrealized loss position | position | 29 |
Number of securities in a gross unrealized loss position for more than twelve months | position | 13 |
Unrealized loss | $ 2,900 |
Level 1 | Common stock |  |
Debt Securities, Available-for-sale [Line Items] |  |
Investment owned (in shares) | shares | 597,808 |

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- Definition Number of investments in debt securities 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 an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
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- Definition Amount of realized gain 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 -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
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