Marketable Securities (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2020 and December 31, 2019, respectively:

	March 31, 2020
Marketable Securities:	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value
Money market and mutual funds	$	28,370	$	410	$	(308	)	$	28,472
Corporate bonds	4,074		33		(94		)	4,013
Government securities - U.S.	5,777		308		—			6,085
Other fixed-income securities	1,418		7		(18		)	1,407
Total	$	39,639	$	758	$	(420	)	$	39,977

	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 March 31, 2020:

	Maturities
Marketable Debt Securities:	Less than 1 Year		1-5 Years		5-10 Years		Greater than 10 Years		Total
Corporate bonds	$	592	$	3,030	$	391	$	—	$	4,013
Government securities - U.S.	—		5,269		329		487		6,085
Other fixed-income securities	50		1,357		—		—		1,407
Total	$	642	$	9,656	$	720	$	487	$	11,505

Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block]

Marketable Debt Securities:	Fair Value		Unrealized Losses
Corporate bonds	$	2,442	$	94
Other fixed-income securities	694		18
Total	$	3,136	$	112