Note 15 - Retirement Benefit Plans (Detail) - Assumptions	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discount rate	4.00%	4.60%	5.50%
Weighted-average assumptions used to determine net periodic benefit cost as of December 31
Discount rate	4.60%	5.50%	5.50%