MARKETABLE SECURITIES

12 Months Ended

Dec. 31, 2019

MARKETABLE SECURITIES [Abstract]

Marketable Securities

NOTE 5. MARKETABLE SECURITIES

The composition of our short-term and long-term marketable securities is as follows:

		December 31, 2019
(In thousands)	Contractual ‎Maturity ‎(in years)	Amortized ‎Cost		Gross ‎Unrealized ‎Gains		Gross Unrealized Losses		Fair ‎Value
Short-term:
Municipal bonds	Less than 1	$	7,840	$	23	$	(1)	$	7,862
Corporate debt securities	Less than 1		69,091		247		(3)		69,335
Commercial paper	Less than 1		34,747		6		(1)		34,752
U.S. government and agency securities	Less than 1		—		—		—		—
Asset-backed securities	Less than 1		3,808		6		—		3,814
Total short-term marketable securities		$	115,486	$	282	$	(5)	$	115,763
Long-term:
Municipal bonds	1 - 3	$	45,010	$	254	$	(8)	$	45,256
Corporate debt securities	1 - 3		186,356		2,578		(5)		188,929
Asset-backed securities	1 - 3		161,347		1,583		(33)		162,897
U.S. government and agency securities	1 - 2		12,366		66		—		12,432
Total long-term marketable securities		$	405,079	$	4,481	$	(46)	$	409,514

		December 31, 2018
(In thousands)	Contractual ‎Maturity ‎(in years)	Amortized ‎Cost		Gross ‎Unrealized ‎Gains		Gross ‎Unrealized ‎Losses		Fair ‎Value
Short-term:
Municipal bonds	Less than 1	$	14,923	$	—	$	(25)	$	14,898
Corporate debt securities	Less than 1		118,823		—		(185)		118,638
Commercial paper	Less than 1		50,202		3		(11)		50,194
U.S. government and agency securities	Less than 1		4,497		—		(1)		4,496
Asset-backed securities	Less than 1		11,765		—		(54)		11,711
Total short-term marketable securities		$	200,210	$	3	$	(276)	$	199,937
Long-term:
Municipal bonds	1 - 2	$	2,676	$	—	$	(4)	$	2,672
Corporate debt securities	1 - 3		127,676		196		(295)		127,577
Asset-backed securities	1 - 3		128,297		262		(89)		128,470
U.S. government and agency securities	1 - 3		4,411		—		(13)		4,398
Total long-term marketable securities		$	263,060	$	458	$	(401)	$	263,117