Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2019

Marketable Securities [Abstract]

Summary of Fair Value of Available-for-sale Marketable Debt Securities by Type of Security

As of December 31, 2019, the fair value of available-for-sale marketable debt securities by type of security was as follows:

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Marketable debt securities:
U.S. Treasury notes	$	42,795	$	73	$	—		$	42,868
U.S. government agency bonds		15,508		31		(1	)		15,538
	$	58,303	$	104	$	(1	)	$	58,406

As of December 31, 2018, the fair value of available-for-sale marketable securities by type of security was as follows:

	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Marketable debt securities:
U.S. Treasury notes	$	62,866	$	—	$	(24	)	$	62,842
U.S. government agency bonds		2,900		—		(15	)		2,885
Corporate bonds		10,276		—		(80	)		10,196
	$	76,042	$	—	$	(119	)	$	75,923

Summary of Available-for-sale Debt Securities by Contractual Maturity

The amortized cost and fair value of the Company’s available-for-sale securities by contractual maturity are summarized as follows:

	December 31, 2019
	Amortized Cost		Fair Value
Maturing in one year or less	$	58,303	$	58,406
	$	58,303	$	58,406

The amortized cost and fair value of the Company’s available-for-sale securities by contractual maturity are summarized as follows:

	December 31, 2018
	Amortized Cost		Fair Value
Maturing in one year or less	$	76,042	$	75,923
	$	76,042	$	75,923