Fair Value Measurements and Marketable Debt Securities (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Summary of Cash Equivalents and Marketable Debt Securities

The following tables summarize the Company’s cash equivalents and marketable debt securities as of September 30, 2021 and December 31, 2020:

	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
September 30, 2021
Cash equivalents:
Money market funds	$	5,172	$	5,172	$	—	$	—
Commercial paper		9,499		—		9,499		—
Total cash equivalents		14,671		5,172		9,499		—
Marketable debt securities:
Commercial paper		6,499		—		6,499		—
Total marketable debt securities		6,499		—		6,499		—
Total cash equivalents and marketable debt securities	$	21,170	$	5,172	$	15,998	$	—
December 31, 2020
Cash equivalents:
Money market funds	$	4,229	$	4,229	$	—	$	—
Commercial paper		6,499		—		6,499		—
Corporate bonds		1,907		—		1,907		—
Total cash equivalents		12,635		4,229		8,406		—
Marketable debt securities:
U.S. Government securities		2,005		—		2,005
Commercial paper		22,485		—		22,485		—
Total marketable debt securities		24,490		—		24,490		—
Total cash equivalents and marketable debt securities	$	37,125	$	4,229	$	32,896	$	—

Summary of Marketable Debt Securities

The following tables summarize the Company’s marketable debt securities as of September 30, 2021 and December 31, 2020.

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
September 30, 2021
Assets:
Commercial paper	$	6,499	$	—	$	—		$	6,499
	$	6,499	$	—	$	—		$	6,499
December 31, 2020
Assets:
U.S. Government securities	$	2,005	$	—	$	—		$	2,005
Commercial paper		22,484		2		(1	)		22,485
	$	24,489	$	2	$	(1	)	$	24,490