Note 3 - Investments in Debt Securities (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Debt Securities, Held-to-Maturity [Table Text Block]

	March 31,		December 31,
	2025		2024
	(unaudited)		(audited)
	(in thousands)
Amortized cost	$	1,573	$	2,687
Unrealized gains		1		5
Estimated fair value	$	1,574	$	2,692

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2025 (unaudited)				December 31, 2024 (audited)
			(in thousands)
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
One year or less	$	1,573	$	1,574	$	2,687	$	2,692
Greater than one year through five years		-		-		-		-
	$	1,573	$	1,574	$	2,687	$	2,692