Note 5 - Benefit Plans (Details) - Benefit Plan Information for the U.S. Pension Plan (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Benefit Plan Information for the U.S. Pension Plan [Abstract]
Service cost	$ 82	$ 140	$ 246	$ 421
Interest cost	101	94	303	282
Expected return on plan assets	(107)	(99)	(321)	(297)
Amortization of net loss	14	62	42	185
Amortization of prior service cost	(2)	(2)	(6)	(6)
	$ 88	$ 195	$ 264	$ 585