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Cash Equivalents and Investments - Schedule of Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Available-for-sale [Line Items]
Available-for-sale Securities	$ 89,576	$ 99,715
Corporate securities
Available-for-sale [Line Items]
Available-for-sale Securities	63,924	72,964
Municipal Debt Securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	12,629	13,215
Federal Home Loan Securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	3,747	3,927
Certificates of Deposit [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	4,300	4,404
U.S. Treasury securities [Member]
Available-for-sale [Line Items]
Available-for-sale Securities	$ 4,976	$ 5,205

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

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-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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- Definition

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+ References

No definition available.

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