Available-for-Sale Securities - Additional Information (Detail)	12 Months Ended
Dec. 31, 2021 USD ($) Security	Dec. 31, 2020 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale debt securities	$ 0	$ 55,576,000
Number of available-for-sale securities in unrealized loss positions for less than twelve months \| Security	0
Other-than-temporary declines in the value of any available-for-sale securities	$ 0
Maximum maturity of available-for-sale debt securities	1 year
Available-for-sale Securities [Member] \| Money Market Funds and Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash equivalents	$ 71,500,000	$ 23,300,000

Other Than Temporary Impairment Losses Investment Available for sale Securities

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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- Definition

Period between issuance and maturity of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

No definition available.

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