Note 13 - Retirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	At December 31,
	2021			2020			2019
	(In thousands)
Service benefit	$	(15	)	$	(35	)	$	(57	)
Interest cost		30			52			72
Net periodic cost	$	15		$	17		$	15

Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]

	At December 31,
	2021			2020			2019
Change in benefit obligation	(In thousands)
Benefit obligation at beginning of year	$	1,654		$	1,782		$	1,913
Service benefit		(15	)		(35	)		(57	)
Interest cost		30			52			72
Benefits paid		(142	)		(145	)		(146	)
Benefit obligation at end of year	$	1,527		$	1,654		$	1,782
Accumulated post-retirement benefit obligation attributable to:
Retirees	$	1,527		$	1,654		$	1,782
Other		-			-			-
Total	$	1,527		$	1,654		$	1,782
Fair value of plan assets		-			-			-
Accumulated post-retirement benefit obligation in excess of plan assets	$	1,527		$	1,654		$	1,782

Defined Benefit Plan, Assumptions [Table Text Block]

	At December 31,
	2021			2020			2019
Weighted-average assumptions used to determine benefit obligations
Discount rate		2.46	%		1.80	%		2.90	%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate		1.80	%		2.90	%		3.76	%

Schedule of Expected Benefit Payments [Table Text Block]

	Estimated future benefit payments
	(In thousands)
2022	$	143
2023		143
2024		142
2025		142
2026		135
Years 2027-2031		534