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Available-for-Sale Marketable Securities in Unrealized Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | $ 28,094 | $ 48,631
Less than 12 Months, Unrealized Loss | (876) | (250)
12 Months or Greater, Fair Value | 32,828 | 2,017
12 Months or Greater, Unrealized Loss | (1,961) | (5)
Total, Fair Value | 60,922 | 50,648
Total, Unrealized Loss | (2,837) | (255)
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 16,500 | 27,909
Less than 12 Months, Unrealized Loss | (544) | (153)
12 Months or Greater, Fair Value | 20,050 | 998
12 Months or Greater, Unrealized Loss | (1,159) | (3)
Total, Fair Value | 36,550 | 28,907
Total, Unrealized Loss | (1,703) | (156)
United States government agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 9,869 | 18,367
Less than 12 Months, Unrealized Loss | (234) | (75)
12 Months or Greater, Fair Value | 11,362 | 1,019
12 Months or Greater, Unrealized Loss | (584) | (2)
Total, Fair Value | 21,231 | 19,386
Total, Unrealized Loss | (818) | (77)
Mortgage-backed securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Less than 12 Months, Fair Value | 1,725 | 2,355
Less than 12 Months, Unrealized Loss | (98) | (22)
12 Months or Greater, Fair Value | 1,416 | 0
12 Months or Greater, Unrealized Loss | (218) | 0
Total, Fair Value | 3,141 | 2,355
Total, Unrealized Loss | $ (316) | $ (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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