Note 3 - Net Periodic Benefit Cost (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Service cost - benefits earned during the period	$ 26,000	$ 20,000	$ 52,000	$ 40,000
Interest cost on projected benefit obligation	238,000	251,000	476,000	501,000
Expected return on plan assets	(335,000)	(349,000)	(671,000)	(697,000)
Recognized actuarial loss	200,000	$ 81,000	399,000	$ 162,000
Settlement loss	311,000		311,000
Net periodic pension cost	$ 440,000	$ 3,000	$ 567,000	$ 6,000