Fair Value Measurements and Marketable Securities - Summary of Gross Unrealized Gains and Losses of Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 38,637	$ 41,703
Gross Unrealized Losses	(3)	(6)
Fair Value	38,634	41,697
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	10,150	13,227
Gross Unrealized Losses	(3)	(6)
Fair Value	10,147	13,221
Commercial Paper [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	28,487	28,476
Fair Value	$ 28,487	$ 28,476

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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