Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale and Equity Securities

The following tables show the Company’s available-for-sale securities’ adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category as of September 30, 2020 and December 31, 2019, respectively:

	September 30, 2020
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value
Money market and mutual funds	$	103,204	$	1,041	$	(59)	$	104,186
Corporate bonds	20,212		227		(24)		20,415
Government securities - U.S.	20,015		202		(1)		20,216
Other fixed-income securities	3,625		29		(4)		3,650
Total	$	147,056	$	1,499	$	(88)	$	148,467

	December 31, 2019
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value
Equity securities	$	4,234	$	170	$	—	$	4,404
Money market and mutual funds	38,028		771		—		38,799
Corporate bonds	4,021		77		—		4,098
Government securities - U.S.	5,341		110		(5)		5,446
Other fixed-income securities	1,614		23		—		1,637
Total	$	53,238	$	1,151	$	(5)	$	54,384

Schedule of Contractual Maturity Dates

The following table summarizes the estimated fair value of our investments in marketable debt securities, accounted for as available-for-sale debt securities and classified by the contractual maturity date of the securities as of September 30, 2020:

	Maturities
Marketable Debt Securities:	Less than 1 Year		1-5 Years		5-10 Years		Greater than 10 Years		Total
Corporate bonds	$	4,355	$	14,274	$	1,786	$	—	$	20,415
Government securities - U.S.	—		17,749		739		1,728		20,216
Other fixed-income securities	50		3,600		—		—		3,650
Total	$	4,405	$	35,623	$	2,525	$	1,728	$	44,281

Schedule of Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value

Marketable Debt Securities:	Fair Value		Unrealized Losses
Corporate bonds	$	8,371	$	24
Government securities - U.S.	267		1
Other fixed-income securities	2,151		4
Total	$	10,789	$	29