Note 2 - Income Taxes (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Effective Income Tax Rate, Continuing Operations	34.90%	35.70%	31.30%	36.60%
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations		$ 79,000
Income Tax Reconciliation, Tax Credits	87,000		198,000
Unrecognized Tax Benefits	225,000		225,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense			11,000
State [Member]
Reduction of State Income Taxes			45,000
Decrease in Deferred State Tax Rates			$ 575,000