Investments (Tables)

3 Months Ended

Mar. 31, 2020

Investments

Schedule of available-for-sale investments at fair value

	March 31, 2020
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
(In thousands)	Cost		(Losses)		Gains		Value
Short-term investments – commercial paper	$	5,578	$	—	$	—	$	5,578
Total short-term investments		5,578		—		—		5,578
Total investments	$	5,578	$	—	$	—	$	5,578

	December 31, 2019
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
(In thousands)	Cost		(Losses)		Gains		Value
Short-term investments – commercial paper	$	2,774	$	—	$	—	$	2,774
Total short-term investments		2,774		—		—		2,774
Total investments	$	2,774	$	—	$	—	$	2,774