Note 11 - Retirement Plans (Tables) - Supplemental Employee Retirement Plan [Member]

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

(In thousands)	2016			2015
Change in Benefit Obligation
Obligation at beginning of year	$	600		$	583
Service cost		19			15
Interest cost		24			19
Actuarial loss		111			19
Benefit payments		(36	)		(36	)
Obligation at end of year	$	718		$	600

Schedule of Net Benefit Costs [Table Text Block]

(In thousands)	2016			2015
Service cost	$	19		$	15
Interest cost		24			19
Recognized net actuarial loss		5			-
Net periodic benefit cost	$	48		$	34
Major assumptions:
Discount rate used to determine net period benefit cost		3.39	%		3.22	%
Discount rate used to determine benefit obligation at year end		3.31			3.39
Rate of compensation increase		4.00			4.00

Schedule of Expected Benefit Payments [Table Text Block]

(In thousands)	Supplemental Retirement Plan
2017	$	36
2018		36
2019		36
2020		71
2021		83
2022-2026		356
Total	$	618

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

(In thousands)	2016		2015
Unrecognized net actuarial loss (gain)	$	87	$	(19	)
Total	$	87	$	(19	)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

(In thousands)	Supplemental Retirement Plan
Unrecognized net actuarial loss	$	5
Total	$	5