Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2021

Investments Debt And Equity Securities [Abstract]

Schedule of Estimated Fair Value of Cash Equivalents and Marketable Securities

The following tables summarize the estimated fair value of the Company’s cash equivalents and marketable securities and the gross unrealized gains and losses (in thousands):

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Cash equivalents:
Money market funds	$	8,888	$	—	$	—		$	8,888
Commercial paper		—		—		—			—
Total cash equivalents		8,888		—		—			8,888
Marketable securities:
Commercial paper		65,443		3		(34	)		65,412
Corporate bonds		12,581		—		(7	)		12,574
Total marketable securities	$	78,024	$	3	$	(41	)	$	77,986

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Cash equivalents:
Money market funds	$	6,700	$	—	$	—		$	6,700
U.S. treasury securities		4,005		—		(1	)		4,004
U.S. government agency securities		66,895		—		(2	)		66,893
Total cash equivalents		77,600		—		(3	)		77,597
Marketable securities:
U.S. treasury securities		53,183		1		(7	)		53,177
Corporate bonds		3,000		1		—			3,001
Total marketable securities	$	56,183	$	2	$	(7	)	$	56,178

Schedule of Gross Unrealized Losses and Fair Value by Investment Category and Age

The following table summarizes the available-for-sale securities in an unrealized loss position for which an allowance for credit losses has not been recorded as of December 31, 2021 and 2020, aggregated by major security type and length of time in a continuous unrealized loss position:

	December 31, 2021
	Less Than 12 Months					12 Months or Longer				Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Commercial paper	$	47,425	$	(34	)	$	—	$	—	$	47,425	$	(34	)
Corporate bonds		12,573		(7	)		—		—		12,573		(7	)
Total marketable securities	$	59,998	$	(41	)	$	—	$	—	$	59,998	$	(41	)
	December 31, 2020
	Less Than 12 Months					12 Months or Longer				Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. treasury securities	$	43,183	$	(8	)	$		$		$	43,183	$	(8	)
U.S. government agency securities		66,893		(2	)		—		—		66,893		(2	)
Total marketable securities	$	110,076	$	(10	)	$	—	$	—	$	110,076	$	(10	)

Summary of Contractual Maturities of Marketable Securities at Estimated Fair Value

The following table summarizes the contractual maturities of the Company's marketable securities at estimated fair value (in thousands):

	December 31,
	2021		2020
Due in one year or less	$	77,986	$	56,178
Due in 1 - 2 years		—		—
Total marketable securities	$	77,986	$	56,178