Marketable Debt Securities

12 Months Ended

Dec. 31, 2020

Investments Debt And Equity Securities [Abstract]

Marketable Debt Securities

5. Marketable Debt Securities

The following tables summarize the Company’s marketable debt securities (in thousands):

	December 31, 2020
	Amortized Cost		Unrealized Losses		Unrealized Gains		Fair Value
Asset-backed securities	$	7,507	$	—	$	15	$	7,522
Corporate debt securities		1,754		—		8		1,762
Commercial paper		999		—		1		1,000
Total	$	10,260	$	—	$	24	$	10,284

	December 31, 2019
	Amortized Cost		Unrealized Losses			Unrealized Gains		Fair Value
Asset-backed securities	$	19,589	$	(1	)	$	10	$	19,598
Corporate debt securities		19,387		(3	)		9		19,393
Commercial paper		17,882		—			11		17,893
U.S. Government agency bonds		5,500		(3	)		—		5,497
Total	$	62,358	$	(7	)	$	30	$	62,381

The following table summarizes the Company’s marketable debt securities by contractual maturity (in thousands):

	December 31, 2020
	Amortized Cost		Fair Value
Within one year	$	10,260	$	10,284
After one year through five years		—		—
After five years		—		—
Total	$	10,260	$	10,284

The following table summarizes the classification of the Company’s marketable debt securities in the consolidated balance sheets (in thousands):

	December 31
	2020		2019
Short-term marketable debt securities	$	10,284	$	51,793
Long-term marketable debt securities		—		10,588
Total	$	10,284	$	62,381