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Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | $ 72,956 | $ 48,631
Less than 12 Months, Unrealized Loss | (2,992) | (250)
12 Months or Longer, Fair Value | 1,996 | 2,017
12 Months or Longer, Unrealized Loss | (196) | (5)
Total, Fair Value | 74,952 | 50,648
Total, Unrealized Loss | (3,188) | (255)
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 42,349 | 27,909
Less than 12 Months, Unrealized Loss | (1,739) | (153)
12 Months or Longer, Fair Value | 1,996 | 998
12 Months or Longer, Unrealized Loss | (196) | (3)
Total, Fair Value | 44,345 | 28,907
Total, Unrealized Loss | (1,935) | (156)
United States government agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 27,413 | 18,367
Less than 12 Months, Unrealized Loss | (895) | (75)
12 Months or Longer, Fair Value | 0 | 1,019
12 Months or Longer, Unrealized Loss | 0 | (2)
Total, Fair Value | 27,413 | 19,386
Total, Unrealized Loss | (895) | (77)
Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 3,194 | 2,355
Less than 12 Months, Unrealized Loss | (358) | (22)
12 Months or Longer, Fair Value | 0 | 0
12 Months or Longer, Unrealized Loss | 0 | 0
Total, Fair Value | 3,194 | 2,355
Total, Unrealized Loss | $ (358) | $ (22)

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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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