Note 8 - Accrued Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	June 30,			December 31,
	2020			2019
	(unaudited)			(audited)
	(in thousands)
Defined benefit pension plan	$	7,435		$	7,658
Non-qualified retirement plans		2,183			2,209
Total		9,618			9,867
Less current portion		(165	)		(165	)
Non-current portion of accrued retirement benefits	$	9,453		$	9,702

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	(unaudited)						(unaudited)
	2020			2019			2020			2019
	(in thousands)						(in thousands)
Interest cost	$	408		$	527		$	816		$	1,053
Expected return on plan assets		(497	)		(482	)		(994	)		(967	)
Amortization of net loss		206			211			412			423
Pension and other postretirement expenses	$	117		$	256		$	234		$	509