Note 4 - Investments

3 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Investment [Text Block]

4. Investments

Available-for-sale securities

The Company’s portfolio of available-for-sale marketable securities consists of the following:

	March 31, 2023
	Amortized		Gross unrealized				Estimated
(In thousands)	Cost		Gains		Losses		Fair Value
Available-for-sale securities, current portion
U.S. government securities	$	9,386	$	-	$	9	$	9,377
Corporate debt securities		24,663		7		7		24,663
Other debt securities		1,743		-		3		1,740
Total short-term		35,792		7		19		35,780
Available-for-sale securities, long-term
Other debt securities		2,018		2		1		2,019
Total marketable securities	$	37,810	$	9	$	20	$	37,799

	Amortized		Estimated
(In thousands)	Cost		Fair Value
Due in one year or less	$	35,792	$	35,780
Due after one year through five years		2,018		2,019
Total	$	37,810	$	37,799

Equity investments

The Company periodically invests in non-marketable equity securities of private companies without a readily determinable fair value to promote business and strategic objectives. These securities included Series A-1 and A-2 Preferred Stock in iVexSol, Inc. with a fair value of $4.1 million for both the periods ending March 31, 2023 and December 31, 2022, respectively, and Series E Preferred Stock in PanTHERA CryoSolutions, Inc. with a fair value of $995,000 as of March 31, 2023 and December 31, 2022.