Note 7 - Defined Benefit Plan (Details) - Components of Net Periodic Benefit Cost (Pension Plan, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 447	$ 351
Interest cost	462	555
Expected return on plan assets	(738)	(807)
Amortization of prior service cost	(75)	(75)
Recognized net actuarial loss	399	381
Net Periodic Benefit Cost	$ 495	$ 405