Available-for-Sale-Securities (Tables)

9 Months Ended

Sep. 30, 2021

Debt Securities, Available-for-sale [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following table is a summary of available-for-sale securities recorded in cash and cash equivalents or marketable securities in our Consolidated Balance Sheets (in thousands):

	September 30, 2021								December 31, 2020
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Corporate debt securities	$	60,903	$	3	$	(61)	$	60,845	$	8,406	$	—	$	(7)	$	8,399
Money market funds	9,600		—		—		9,600		7,591		—		—		7,591
Municipal debt securities	26,539		—		(7)		26,532		14,753		—		(6)		14,747
Total	$	97,042	$	3	$	(68)	$	96,977	$	30,750	$	—	$	(13)	$	30,737

Schedule of Marketable Securities

Estimated fair values of available-for-sale securities are generally based on prices obtained from commercial pricing services. The following table summarizes the classification of the available-for-sale securities in our Consolidated Balance Sheets (in thousands):

	September 30, 2021		December 31, 2020
Cash equivalents	$	9,600	$	12,676
Marketable securities	87,377		18,061
Total	$	96,977	$	30,737

Investments Classified by Contractual Maturity Date

The following table summarizes our portfolio of available-for-sale securities by contractual maturity (in thousands):

	September 30, 2021
	Amortized Cost		Estimated Fair Value
Less than one year	$	96,979	$	96,914
Greater than one year	63		63
Total	$	97,042	$	96,977