Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash Equivalents And Investments [Abstract]

Schedule of Fair Value of Securities, not Including Cash

The fair value of cash equivalents and available-for-sale investments at December 31, 2019 and 2018, were as follows (in thousands):

	December 31, 2019
	Amortized Cost		Gross Unrealized				Estimated Fair Value
			Gains		Losses
Money market funds	$	13,897	$	—	$	—	$	13,897
U.S. government securities	77,329		72		(1)		77,400
Corporate notes	14,955		11		—		14,966
Commercial paper	35,753		—		—		35,753
Total available-for-sale marketable debt securities	$	141,934	$	83	$	(1)	$	142,016
Classified as:
Cash equivalents							$	13,897
Short-term investments							120,089
Long-term investments							8,030
Total cash equivalents and available-for-sale investments							$	142,016

Schedule of Fair Value of Short-term and Long-term Marketable Securities Classified by Maturity

The following table summarizes the fair value of the Company's cash equivalents, short-term and long-term marketable securities classified by maturity (in thousands):

	December 31,
	2019		2018
Due within one year	$	133,986	$	73,411
Due after one year through three years	8,030		—
Total cash equivalents and available-for-sale investments	$	142,016	$	73,411

Schedule of Available-for-Sale Securities Unrealized Loss Position

The following tables present the Company's available-for-sale securities that were in an unrealized loss position as of  December 31, 2018 (in thousands):

	December 31, 2018
	Less than 12 months				12 Months or Greater				Total
Assets	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government securities	$	5,977	$	(1)	$	—	$	—	$	5,977	$	(1)
Corporate notes	11,521		(10)		2,993		(8)		14,514		(18)
Total	$	17,498	$	(11)	$	2,993	$	(8)	$	20,491	$	(19)