Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2021

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 June 30, 2021 and December 31, 2020, respectively:

	June 30, 2021
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value
Mutual and money market funds	$	90,907	$	1,171	$	(346)	$	91,732
Corporate bonds	22,853		224		(21)		23,056
Government securities - U.S.	17,873		78		(98)		17,853
Other fixed-income securities	3,055		13		(8)		3,060
Total	$	134,688	$	1,486	$	(473)	$	135,701

	December 31, 2020
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value
Mutual and money market funds	$	103,404	$	1,288	$	(20)	$	104,672
Corporate bonds	21,811		350		(6)		22,155
Government securities - U.S.	18,849		155		(5)		18,999
Other fixed-income securities	3,839		22		(7)		3,854
Total	$	147,903	$	1,815	$	(38)	$	149,680

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 June 30, 2021:

	Maturities
Marketable Debt Securities:	Less than 1 Year		1-5 Years		5-10 Years		Greater than 10 Years		Total
Corporate bonds	$	7,563	$	15,406	$	87	$	—	$	23,056
Government securities - U.S.	4,399		10,889		881		1,684		17,853
Other fixed-income securities	1,003		1,352		705		—		3,060
Total	$	12,965	$	27,647	$	1,673	$	1,684	$	43,969