Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of marketable securities

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

	March 31, 2020
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Short-term marketable securities:*
Corporate debt securities	$	44,888	$	42	$	(101)	$	44,829
Certificates of deposit	4,800		—		—		4,800
Commercial paper	1,000		—		—		1,000
Total short-term marketable securities	$	50,688	$	42	$	(101)	$	50,629
Long-term marketable securities:**
Corporate debt securities	$	18,858	$	29	$	(228)	$	18,659
Certificates of deposit	1,000		—		—		1,000
Total long-term marketable securities	$	19,858	$	29	$	(228)	$	19,659
Total marketable securities	$	70,546	$	71	$	(329)	$	70,288

* Represents marketable securities with a remaining maturity of less than one year.

** Represents marketable securities with a remaining maturity of one to three years classified as short-term on our condensed consolidated balance sheets.

	December 31, 2019
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Short-term marketable securities:*
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 short-term marketable securities	$	50,436	$	140	$	(2)	$	50,574
Long-term marketable securities:**
Corporate debt securities	$	8,016	$	152	$	—	$	8,168
Total long-term marketable securities	8,016		152		—		8,168
Total marketable securities	$	58,452	$	292	$	(2)	$	58,742

* Represents marketable securities with a remaining maturity of less than one year.

** Represents marketable securities with a remaining maturity of one to three years classified as short-term on our condensed consolidated balance sheets.