Fair Value Measurements and Available for Sale Investments (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Measurements And Available For Sale Investments [Abstract]

Assets Measured at Fair Value on Recurring Basis

The following table presents the hierarchy for assets measured at fair value on a recurring basis as of March 31, 2022 and December 31, 2021 (in thousands):

	Fair Value Measurements at End of Period Using:
	Total Fair Value		Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of March 31, 2022
Money market funds	$	94,667	$	94,667	$	—	$	—
Commercial paper	114,566		—		114,566		—
Corporate debt securities	37,141		—		37,141		—
As of December 31, 2021
Money market funds	$	139,794	$	139,794	$	—	$	—
Commercial paper	113,939		—		113,939		—
Corporate debt securities	37,873		—		37,873		—

Schedule of Available for Sale Investments by Security Type

The aggregate market value, cost basis, and gross unrealized losses of available-for-sale investments by security type, classified in marketable securities and long-term investments as of March 31, 2022 and December 31, 2021 are as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Total Fair Value
As of March 31, 2022
Corporate debt securities	$	37,346	$	—	$	(205)	$	37,141
Commercial paper	$	95,796	$	—	$	(221)	$	95,575
Total marketable securities	$	133,142	$	—	$	(426)	$	132,716
As of December 31, 2021
Corporate debt securities	$	37,921	$	—	$	(48)	$	37,873
Commercial paper	$	103,942	$	—	$	—	$	103,942
Total marketable securities	$	141,863	$	—	$	(48)	$	141,815

Schedule of Contractual Maturities of Available-for-sale Debt Securities

Contractual maturities of available-for-sale debt securities, as of March 31, 2022, were as follows (in thousands):

	Estimated  Fair Value
Less than one year	$	132,716
Greater than one year	—
Total	$	132,716