Note 4 - Investments (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	March 31,			December 31,
	2023			2022
	(unaudited)			(audited)
	(in thousands)
Amortized cost	$	3,014		$	2,983
Unrealized gains		3			9
Unrealized losses		(7	)		-
Fair value	$	3,010		$	2,992

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2023 (unaudited)				December 31, 2022 (unaudited)
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(in thousands)
One year or less	$	2,956	$	2,952	$	2,432	$	2,440
Greater than one year through five years		58		58		551		552
	$	3,014	$	3,010	$	2,983	$	2,992