Investments (Tables)

9 Months Ended

Sep. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Investments

The following tables summarize the Company’s available-for-sale investments at September 30, 2019 and December 31, 2018 (in thousands):

	September 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	4,163	$	21	$	(1	)	$	4,183
U.S. Treasury securities	11,975		26		—			12,001
U.S. Agency securities	1,505		—		—			1,505
Asset-backed securities	1,107		—		—			1,107
Corporate notes and bonds	10,170		12		—			10,182
Total	$	28,920	$	59	$	(1	)	$	28,978

	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	10,787	$	—	$	—		$	10,787
U.S. Treasury securities	22,185		1		(66		)	22,120
U.S. Agency securities	8,024		1		(45		)	7,980
Commercial paper	17,025		—		—			17,025
Asset-backed securities	12,007		—		(9		)	11,998
Corporate notes and bonds	30,361		—		(53		)	30,308
Total	$	100,389	$	2	$	(173	)	$	100,218

Schedule of Available-For-Sale Investment Maturities

The following table summarizes the maturities of the Company’s available-for-sale securities at September 30, 2019 and December 31, 2018 (in thousands):

	September 30, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than 1 year	$	28,920	$	28,978	$	83,030	$	82,893
Due in 1-3 years	—		—		17,359		17,325
	$	28,920	$	28,978	$	100,389	$	100,218