Note 9 - Income Taxes (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Percent	41.30%	40.20%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	4.60%	4.40%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	1.60%	1.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	1.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	0.90%	0.20%