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Available-for-Sale-Securities

3 Months Ended

Mar. 31, 2021

Debt Securities, Available-for-sale [Abstract]

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):


	March 31, 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	$	59,937	$	—	$	(61)	$	59,876	$	8,406	$	—	$	(7)	$	8,399
Money market funds	18,044		—		—		18,044		7,591		—		—		7,591
Municipal debt securities	29,016		—		(12)		29,004		14,753		—		(6)		14,747

Total	$	106,997	$	—	$	(73)	$	106,924	$	30,750	$	—	$	(13)	$	30,737

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):


	March 31, 2021		December 31, 2020
Cash and cash equivalents	$	24,157	$	12,676
Marketable securities	82,767		18,061
Total	$	106,924	$	30,737

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


	March 31, 2021
	Amortized Cost		Estimated Fair Value
Less than one year	$	106,997	$	106,924
Greater than one year	—		—
Total	$	106,997	$	106,924