Note 6 - Stock-Based Compensation (Details) - Components of Pre-tax Stock-based Compensation Expense, Net of Forfeitures and Income Tax Effect (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Note 6 - Stock-Based Compensation (Details) - Components of Pre-tax Stock-based Compensation Expense, Net of Forfeitures and Income Tax Effect [Line Items]
stock-based compensation expense	$ 293	$ 346
Income tax effect	113	135
Employee Stock Option [Member]
Note 6 - Stock-Based Compensation (Details) - Components of Pre-tax Stock-based Compensation Expense, Net of Forfeitures and Income Tax Effect [Line Items]
stock-based compensation expense		6
Restricted Stock [Member]
Note 6 - Stock-Based Compensation (Details) - Components of Pre-tax Stock-based Compensation Expense, Net of Forfeitures and Income Tax Effect [Line Items]
stock-based compensation expense	293	340
Stock Based Compensation Expense [Member]
Note 6 - Stock-Based Compensation (Details) - Components of Pre-tax Stock-based Compensation Expense, Net of Forfeitures and Income Tax Effect [Line Items]
stock-based compensation expense	$ 180	$ 211