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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
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	$ 289	$ 449	$ 957	$ 1,531
Income tax effect	113	174	373	594
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	0	15	6	46
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	289	434	951	1,485
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	$ 176	$ 275	$ 584	$ 937