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Available-for-Sale-Securities

6 Months Ended

Jun. 30, 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):


	June 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	$	53,287	$	4	$	(17)	$	53,274	$	8,406	$	—	$	(7)	$	8,399
Money market funds	7,922		—		—		7,922		7,591		—		—		7,591
Municipal debt securities	41,017		1		(6)		41,012		14,753		—		(6)		14,747

Total	$	102,226	$	5	$	(23)	$	102,208	$	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):


	June 30, 2021		December 31, 2020
Cash equivalents	$	9,053	$	12,676
Marketable securities	93,155		18,061
Total	$	102,208	$	30,737

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


	June 30, 2021
	Amortized Cost		Estimated Fair Value
Less than one year	$	102,162	$	102,144
Greater than one year	64		64
Total	$	102,226	$	102,208