Note 9 - Accrued Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	March 31,		December 31,
	2023		2022
	(unaudited)		(audited)
	(in thousands)
Defined benefit pension plan	$	1,041	$	1,023
Non-qualified retirement plans		1,720		1,731
Total		2,761		2,754
Less current portion		142		142
Non-current portion of accrued retirement benefits	$	2,619	$	2,612

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended
	March 31,
	(unaudited)
	2023			2022
	(in thousands)
Interest cost	$	203		$	264
Expected return on plan assets		(164	)		(306	)
Amortization of net loss		82			156
Pension and other postretirement expenses	$	121		$	114