Note 8 - Accrued Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	June 30,			December 31,
	2021			2020
	(unaudited)			(audited)
	(in thousands)
Defined benefit pension plan	$	7,987		$	8,790
Non-qualified retirement plans		2,269			2,301
Total		10,256			11,091
Less current portion		(165	)		(165	)
Non-current portion of accrued retirement benefits	$	10,091		$	10,926

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	(unaudited)						(unaudited)
	2021			2020			2021			2020
	(in thousands)
Interest cost	$	309		$	408		$	618		$	816
Expected return on plan assets		(418	)		(497	)		(836	)		(994	)
Amortization of net loss		221			206			442			412
Pension and other postretirement expenses	$	112		$	117		$	224		$	234