Note 5 - Investments, Available-for-sale

9 Months Ended

Sep. 30, 2023

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

5. Investments, Available for Sale

The aggregate fair values of investment securities along with cumulative unrealized gains and losses determined on an individual investment security basis and included in accumulated other comprehensive loss in the condensed consolidated balance sheets are as follows:

	September 30, 2023
										Balance Sheet Classification
(In thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value		Short-term investments		Long-term investments
Commercial Paper	$	-	$	-	$	-		$	-	$	-	$	-
Corporate Bonds		4,960		-		(28	)		4,932		4,932		-
US Treasuries		5,491		-		-			5,491		5,491		-
U.S. Government Agencies		1,000		-		(3	)		997		997		-
Total Investments	$	11,451	$	-	$	(31	)	$	11,420	$	11,420	$	-

	December 31, 2022
										Balance Sheet Classification
(In thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value		Short-term investments		Long-term investments
Commercial Paper	$	12,364	$	-	$	(49	)	$	12,315	$	12,315	$	-
Corporate Bonds		55,201		-		(447	)		54,754		50,889		3,865
U.S. Government Agencies		999		-		(8	)		991		991		-
Total Investments	$	68,564	$	-	$	(504	)	$	68,060	$	64,195	$	3,865

As of September 30, 2023, contractual maturities of available-for-sale investments were one year or less. Actual maturities may differ from contractual maturities because certain borrowers have the right to call or prepay certain obligations. There were no sales of investments or gross realized gains or losses for the three or nine months ended September 30, 2023 or 2022.