FAIR VALUE MEASUREMENTS - (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Summary of Fair Value Measurements of Cash Equivalents and Marketable Securities

The fair value measurements of the Company’s cash equivalents and marketable securities are identified at the following levels within the fair value hierarchy (in thousands):

	March 31, 2022
	Fair Value Measurements
	Total		Level 1		Level 2		Level 3
Assets:
Cash equivalents:
Money market funds	$	49,827	$	49,827	$	—	$	—
U.S. government-sponsored entity debt securities	15,008		—		15,008		—
Total	64,835		49,827		15,008		—
Marketable securities:
U.S. government-sponsored entity debt securities	24,441		—		24,441		—
Commercial paper securities	117,325		—		117,325		—
Corporate debt securities	17,373		—		17,373		—
Asset-backed securities	67,515		—		67,515		—
U.S. treasury bills	2,995		—		2,995		—
Certificates of deposit	50,405		—		50,405		—
Total	280,054		—		280,054		—
Total cash equivalents and marketable securities	$	344,889	$	49,827	$	295,062	$	—

	December 31, 2021
	Fair Value Measurements
	Total		Level 1		Level 2		Level 3
Assets:
Cash equivalents:
Money market funds	$	119,919	$	119,919	$	—	$	—
Total	119,919		119,919		—		—
Marketable securities:
U.S. government-sponsored entity debt securities	30,614		—		30,614		—
Commercial paper securities	105,757		—		105,757		—
Corporate debt securities	33,682		—		33,682		—
Asset-backed securities	70,701		—		70,701		—
Certificates of deposit	45,091		—		45,091		—
Total	285,845		—		285,845		—
Total cash equivalents and marketable securities	$	405,764	$	119,919	$	285,845	$	—