Note 4 - Investments

12 Months Ended

Dec. 31, 2022

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:

	December 31, 2022
	Amortized		Gross unrealized				Estimated
(In thousands)	Cost		Gains		Losses		Fair Value
Available-for-sale securities, current portion
U.S. government securities	$	15,087	$	1	$	37	$	15,051
Corporate debt securities		26,057		6		16		26,047
Other debt securities		2,169		-		7		2,162
Total short-term		43,313		7		60		43,260
Available-for-sale securities, long-term
Other debt securities		1,329		3		-		1,332
Total marketable securities	$	44,642	$	10	$	60	$	44,592

	Amortized		Estimated
(In thousands)	Cost		Fair Value
Due in one year or less	$	43,313	$	43,260
Due after one year through five years		1,329		1,332
Total	$	44,642	$	44,592

There were no outstanding available-for-sale marketable securities as of December 31, 2021.

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 and $3.4 million as of December 31, 2022 and December 31, 2021, respectively, and Series E Preferred Stock in PanTHERA CryoSolutions, Inc. with a fair value of $995,000 as of December 31, 2022 and December 31, 2021.