Note 8 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Marketable Securities [Table Text Block]

	March 31, 2025
(In thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Marketable securities
Corporate and municipal debt securities	$	5,398	$	178	$	(1	)	$	5,575

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2025				December 31, 2024
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	1,805	$	1,875	$	1,565	$	1,630
Due after one year through five years		3,593		3,700		3,689		3,780
Total	$	5,398	$	5,575	$	5,254	$	5,410