Note 9 - Retirement Plans (Detail) - Estimated rate of increase in compensation levels	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted-average assumptions used to determine net periodic benefit cost for our active pension plan:
Discount rate	4.84%	5.85%
Expected long-term rate of return on pension plan assets	7.00%	7.00%
Estimated rate of increase in compensation levels	5.63%	5.00%
Weighted-average assumptions used to determine benefit obligations:
Discount rate	4.31%	4.84%
Estimated rate of increase in compensation levels	5.63%	5.63%