Note 5 - Benfit Plans (Details) - Benefit Plan Information for the U.S. Pension Plan (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Benefit Plan Information for the U.S. Pension Plan [Abstract]
Service cost	$ 82	$ 146
Interest cost	101	90
Expected return on plan assets	(107)	(100)
Amortization of net loss	14	66
Amortization of prior service cost	(2)	(2)
	$ 88	$ 200