Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of marketable securities

The following is a summary of our marketable securities as of June 30, 2020 and December 31, 2019 (in thousands):

	June 30, 2020
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Securities maturing within one year:
Corporate debt securities	$	26,430	$	170	$	—	$	26,600
Certificates of deposit	3,300		—		—		3,300
Commercial paper	1,000		—		—		1,000
Total securities maturing within one year	$	30,730	$	170	$	—	$	30,900
Securities maturing between one and three years:
Corporate debt securities	$	16,299	$	395	$	—	$	16,694
Certificates of deposit	1,000		—		—		1,000
Total securities maturing between one and three years	$	17,299	$	395	$	—	$	17,694
Total marketable securities	$	48,029	$	565	$	—	$	48,594

	December 31, 2019
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Securities maturing within one year:
Corporate debt securities	$	46,186	$	140	$	(2)	$	46,324
U.S. treasury and government agency securities	2,750		—		—		2,750
Certificates of deposit	1,500		—		—		1,500
Total securities maturing within one year	$	50,436	$	140	$	(2)	$	50,574
Securities maturing between one and three years:
Corporate debt securities	$	8,016	$	152	$	—	$	8,168
Total securities maturing between one and three years	8,016		152		—		8,168
Total marketable securities	$	58,452	$	292	$	(2)	$	58,742