MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2023

MARKETABLE SECURITIES

Schedule of Available-for-sale Securities

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2023, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Corporate securities	$	10,688	$	—	$	(42)	$	10,646
Total		10,688		—		(42)		10,646
Investments due in 4-12 months:
Commercial paper		718		—		—		718
Corporate securities		48,680		15		(347)		48,348
Total		49,398		15		(347)		49,066
Investments due in 12 months or greater:
Corporate securities		187,298		952		(322)		187,928
Total		187,298		952		(322)		187,928
Total marketable securities	$	247,384	$	967	$	(711)	$	247,640

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2022, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Corporate securities	$	21,803	$	—	$	(135)	$	21,668
Total		21,803		—		(135)		21,668
Investments due in 4-12 months:
Corporate securities		173,833		—		(4,019)		169,814
Total		173,833		—		(4,019)		169,814
Investments due in 12 months or greater:
Corporate securities		58,128		71		(1,240)		56,959
Total		58,128		71		(1,240)		56,959
Total marketable securities	$	253,764	$	71	$	(5,394)	$	248,441

Schedule of Available-for-sale Securities in an Unrealized Loss Position

	Less Than 12 Months				12 Months or Longer				Total
	Estimated		Gross		Estimated		Gross		Estimated		Gross
	Fair Market		Unrealized		Fair Market		Unrealized		Fair Market		Unrealized
(In thousands)	Value		Losses		Value		Losses		Value		Losses
December 31, 2023
Corporate securities	$	102,729	$	(371)	$	25,401	$	(340)	$	128,130	$	(711)
Total marketable securities	$	102,729	$	(371)	$	25,401	$	(340)	$	128,130	$	(711)

	Less Than 12 Months				12 Months or Longer				Total
	Estimated		Gross		Estimated		Gross		Estimated		Gross
	Fair Market		Unrealized		Fair Market		Unrealized		Fair Market		Unrealized
(In thousands)	Value		Losses		Value		Losses		Value		Losses
December 31, 2022
Corporate securities	$	45,047	$	(662)	$	191,443	$	(4,732)	$	236,490	$	(5,394)
Total marketable securities	$	45,047	$	(662)	$	191,443	$	(4,732)	$	236,490	$	(5,394)