Note 3 - Net Periodic Benefit Cost (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Service cost - benefits earned during the period	$ (16,000)	$ 20,000	$ 36,000	$ 60,000
Interest cost on projected benefit obligation	237,000	250,000	713,000	751,000
Expected return on plan assets	(336,000)	(349,000)	(1,007,000)	(1,046,000)
Recognized actuarial loss	199,000	81,000	598,000	243,000
Settlement loss	16,000	60,000	327,000	60,000
Net periodic pension cost	$ 100,000	$ 62,000	$ 667,000	$ 68,000