Marketable Securities (Tables)

9 Months Ended

Sep. 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 September 30, 2021 and December 31, 2020, respectively:


	September 30, 2021
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value


Mutual and money market funds	$	87,965	$	1,083	$	(480)	$	88,568
Corporate bonds	18,935		168		(32)		19,071
Government securities - U.S.	13,503		64		(105)		13,462

Other fixed-income securities	1,818		7		(2)		1,823
Total	$	122,221	$	1,322	$	(619)	$	122,924


	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 September 30, 2021:


	Maturities
Marketable Debt Securities:	Less than 1 Year		1-5 Years		5-10 Years		Greater than 10 Years		Total

Corporate bonds	$	4,733	$	14,012	$	326	$	—	$	19,071
Government securities - U.S.	369		10,915		884		1,294		13,462

Other fixed-income securities	—		1,170		653		—		1,823
Total	$	5,102	$	26,097	$	1,863	$	1,294	$	34,356