Note I - Income Taxes (Detail) - Income Tax Expense Related to Uncertain Tax Positions (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income tax expense related to uncertain tax positions	$ 715	$ 810	$ 137
Interest expense related to uncertain tax positions	212	228	141
Total income tax expense related to uncertain tax positions	$ 927	$ 1,038	$ 278