Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2020

Cash And Cash Equivalents [Abstract]

Cash Equivalents and Marketable Securities

The amortized cost, unrealized gains and losses and fair values of cash equivalents and marketable securities were as follows (in thousands):

	December 31, 2020
Description	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Cash equivalents:
Money market funds	$	36,801	$	—	$	—	$	36,801
Total cash equivalents		36,801		—		—		36,801
Short-term marketable securities:
U.S. treasuries		1,002		—		—		1,002
Total short-term marketable securities		1,002		—		—		1,002
Total	$	37,803	$	—	$	—	$	37,803

	December 31, 2019
Description	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash equivalents:
Money market funds	$	42,133	$	—	$	—		$	42,133
Commercial paper		1,749		—		—			1,749
Corporate debt securities		2,500		—		—			2,500
Total cash equivalents		46,382		—		—			46,382
Short-term marketable securities:
Certificates of deposit		631		—		—			631
Commercial paper		31,476		15		—			31,491
Corporate debt securities		38,237		15		(6	)		38,246
Total short-term marketable securities		70,344		30		(6	)		70,368
Total	$	116,726	$	30	$	(6	)	$	116,750