Note 1 - Summary of Significant Accounting Policies (Detail) - Change of Accounting Method for Tires (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Pre-tax Basis	$ 2,257	$ 1,590
Net of Tax	$ 1,392	$ 981
Per Share Effect (in Dollars per share)	$ 0.13	$ 0.10