Fair Value Measurements of Financial Instruments - Summary of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 25,555	$ 25,548
Gross Unrealized Loss	(96)	(33)
Estimated Fair Values	25,459	25,515
Money Market Funds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,285	8,222
Estimated Fair Values	6,285	8,222
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,240	3,993
Gross Unrealized Loss	(25)	(6)
Estimated Fair Values	6,215	3,987
Corporate Bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	13,030	13,333
Gross Unrealized Loss	(71)	(27)
Estimated Fair Values	12,959	13,306
Cash and Cash Equivalents
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Values	7,535	8,222
Short-term Investments
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Values	15,923	14,942
Other Assets
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Values	$ 2,001	$ 2,351

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).

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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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