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Balance Sheet Components - Summary of Available for Sale Securities in Unrealized Loss Position, Fair Value and Gross Unrealized Loss By Length of Time Security in Continual Unrealized Loss Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | $ 31,538 | $ 328,162
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | (170) | (903)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 159,627 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | (2,368) | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 191,165 | 328,162
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | (2,538) | (903)
Corporate bonds [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | 6,738 | 177,124
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | (147) | (492)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 75,270 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | (925) | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 82,008 | 177,124
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | (1,072) | (492)
U.S. government bonds [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | 22,326 | 91,522
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | (13) | (318)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 67,909 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | (1,194) | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 90,235 | 91,522
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | (1,207) | (318)
Agency bonds [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | 0 | 23,274
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | 0 | (64)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 11,468 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | (222) | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 11,468 | 23,274
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | (222) | (64)
Asset-backed securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | 2,474 | 27,087
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | (10) | (18)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 0 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | 0 | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 2,474 | 27,087
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | (10) | (18)
Foreign government bonds [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available for sale securities in continual unrealized loss position, less than 12 months, estimated fair value | 0 | 9,155
Available for sale securities in continual unrealized loss position, less than 12 months, gross unrealized holding losses | 0 | (11)
Available for sale securities in continual unrealized loss position, 12 months or more, estimated fair value | 4,980 | 0
Available for sale securities in continual unrealized loss position, 12 months or more, gross unrealized holding losses | (27) | 0
Available for sale securities in continual unrealized loss position, estimated fair value | 4,980 | 9,155
Available for sale securities in continual unrealized loss position, gross unrealized holding losses | $ (27) | $ (11)

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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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