Note 9 - Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 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	40.20%	35.50%	40.50%	37.70%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent			4.50%	1.70%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent			1.60%	1.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent			0.30%
Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent			0.90%	0.20%