Note 9 - Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
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	38.20%	38.80%	38.10%	42.60%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent			3.80%	2.90%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent			0.50%	1.80%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent			0.20%	0.40%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent				2.70%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent				0.60%