Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

The following tables set forth the measurement at fair value on a recurring basis of the investments in money market funds, short-term cash instruments and U.S. government securities. The securities are categorized as a Level 1 asset, as their valuation is based on quoted prices for identical assets in active markets. See “Note 3 — Cash and Cash Equivalents”.

Assets Measured at Fair Value on a Recurring Basis as of December 31, 2021

	Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Balance as of December 31, 2021
	(in thousands)
Assets
Cash equivalents	$	70,689	$	—	$	—	$	70,689
Total	$	70,689	$	—	$	—	$	70,689

Assets Measured at Fair Value on a Recurring Basis as of December 31, 2020

	Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Balance as of December 31, 2020
	(in thousands)
Assets
Cash equivalents	$	70,826	$	—	$	—	$	70,826
Total	$	70,826	$	—	$	—	$	70,826