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Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	$ 99,715	$ 104,870
Corporate Securities [Member]
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	72,964	71,095
Municipal Debt Securities [Member]
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	13,215	18,707
Federal Home Loan Securities [Member]
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	3,927	8,017
Certificates of Deposit [Member]
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	4,404	5,991
US Treasury Securities [Member]
Schedule of Avaliable-For-Sale Securities [Line Items]
Available-for-sale Securities	$ 5,205	$ 1,060

X

- Definition

Amount of 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 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563

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+ References

No definition available.

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