Note 8 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Marketable Securities [Table Text Block]

	June 30, 2025
(In thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Marketable securities
Corporate, municipal debt and treasury securities	$	5,435	$	207	$	−	$	5,642

Investments Classified by Contractual Maturity Date [Table Text Block]

	June 30, 2025				December 31, 2024
(In thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	1,911	$	2,013	$	1,565	$	1,630
Due after one year through four years		3,524		3,629		3,689		3,780
Total	$	5,435	$	5,642	$	5,254	$	5,410