Cash Equivalents and Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2019

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):

	September 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Cash equivalents
Money market funds	$	13,447	$	—	$	—		$	13,447
Reverse repurchase agreements		6,250		—		—			6,250
Total cash equivalents		19,697		—		—			19,697
Marketable securities
U.S. government securities		750		—		—			750
Commercial paper		23,096		22		—			23,118
Corporate bonds		40,231		67		(11	)		40,287
Total marketable securities	$	64,077	$	89	$	(11	)	$	64,155

	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Cash equivalents
Money market funds	$	7,180	$	—	$	—		$	7,180
Reverse repurchase agreements		6,250		—		—			6,250
Commercial paper		5,977		—		(1	)		5,976
Total cash equivalents		19,407		—		(1	)		19,406
Marketable securities
U.S. government securities		4,114		—		(2	)		4,112
Commercial paper		47,964		—		(24	)		47,940
Total marketable securities	$	52,078	$	—	$	(26	)	$	52,052

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):

	September 30,		December 31,
	2019		2018
Due in one year or less	$	57,014	$	52,052
Due in 1 - 2 years		7,141		—
Total marketable securities	$	64,155	$	52,052