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Short-term investments - Summary of Short-term Investments (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Gross Unrealized Losses	$ (2,430)	$ (2,430)
Short-Term Investments [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	196,776	196,776
Gross Unrealized Gains		0
Gross Unrealized Losses	(2,400)	(2,429)
Fair Value	194,347	194,347
Corporate Debt Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	173,376	173,376
Gross Unrealized Losses		(2,326)
Fair Value	171,050	171,050
Asset-Backed Securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	20,449	20,449
Gross Unrealized Losses		(86)
Fair Value	20,363	20,363
Government securities [Member] | Short-Term Investments [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	2,951	2,951
Gross Unrealized Losses		(17)
Fair Value	$ 2,934	$ 2,934

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- Definition

Amortized cost 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
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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