Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis included the following as of March 31, 2022 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of March 31, 2022
Cash equivalents:
Money market funds	$	119,506	$	—	$	—	$	119,506
Short-term investments:
U.S. Treasury Obligations		20,003		—		—		20,003
Long-term investment:
Failed Auction Security		—		—		2,536		2,536

Assets and liabilities measured at fair value on a recurring basis included the following as of December 31, 2021 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of December 31, 2021
Cash equivalents:
Money market funds	$	94,282	$	—	$	—	$	94,282
Short-term investments:
U.S. Treasury Obligations		45,215		—		—		45,215
Long-term investment:
Failed Auction Security		—		—		2,639		2,639

Change in Estimated Fair Values Calculated for Investment Valued on Recurring Basis Utilizing Level 3 Inputs

The change in the estimated fair value calculated for the investment valued on a recurring basis utilizing Level 3 inputs (i.e., the Failed Auction Security) for the three months ended March 31, 2022 was as follows (in thousands):

Balance at the beginning of the period	$	2,639
Credit gain on available-for-sale security included in Other income (expense), net		1
Loss included in Other comprehensive income		(104	)
Balance at the end of the period	$	2,536