Note 11 - Benfit Plans (Detail) - Benefit Plan Information for the U.S. Pension Plan (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of projected benefit obligation:
Obligation at January 1	$ 7,535	$ 5,866
Service Cost	482	401
Interest Cost	360	331
Expected return on plan assets	(345)	(294)
Amortization of net loss	203	39
Amortization of prior service credit	(11)	(25)
Net periodic benefit cost	689	452
Actuarial loss	1,164	1,215
Fair value of plan assets at January 1	4,088	3,643
Actual return on plan assets	407	35
Employer contributions	895	688
Benefit Payments	(62)	(278)
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net loss	1,102	1,473
Amortization of net loss	(203)	(39)
Amortization of prior service cost	11	25
Total loss recognized in other comprehensive (income) loss	910	1,459
Fair Value of Plan assets	5,328	4,088
Amounts recognized in consolidated balance sheets:
Prior service credit	7	19
Net loss	(3,093)	(2,194)
Accumulated other comprehensive loss	(3,086)	(2,175)
Periodic benefit cost	(1,065)	(1,272)
Funded Status:
Net Amount Recognized in Consolidated Balance Sheet	(4,151)	(3,447)
Projected Benefit Obligation	9,479	7,535
Accumulated benefit obligation	8,701	6,928
Net Periodic Benefit Cost and Other Comprehensive (Income) Loss, Total Recognized [Member]
Amounts recognized in consolidated balance sheets:
Periodic benefit cost	$ 1,599	$ 1,911