Note 12 - Employee Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits				Postretirement benefits
	Three months ended March 31,				Three months ended March 31,
	2015		2014		2015		2014
Service cost	$	23	$	16	$	3	$	3
Interest cost		36		38		8		9
Expected return on plan assets		(45)		(43)
Amortization of net loss						1
Amortization of prior service cost (credit)		2		2		(1)		(1)
Total pension and postretirement benefit expense	$	16	$	13	$	11	$	11