Investments in Available-for-Sale Securities (Tables)

6 Months Ended

Jun. 30, 2020

Investments in Available-for-Sale Securities

Available-for-sale Securities

	June 30, 2020
			Gross					Allowance
			Unrealized					for Credit	Fair
	Cost Basis		Gains		Losses			Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	14,030	$	24	$	—	$	—	$	14,054
Corporate notes and bonds		53,161		166		(144)		—		53,183
Total Investments	$	67,191	$	190	$	(144)	$	—	$	67,237

	December 31, 2019
			Gross					Allowance
			Unrealized					for Credit	Fair
	Cost Basis		Gains			Losses		Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	35,044	$	1	$	(16)	$	—	$	35,029
Corporate notes and bonds		100,643		200		(205)		—		100,638
Total Investments	$	135,687	$	201	$	(221)	$	—	$	135,667