Note 9 - Income Taxes (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	35.00%
Effective Income Tax Rate Reconciliation, Percent	136.50%	38.40%	42.00%	40.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent			4.60%	4.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent			2.10%	1.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent			1.00%	(0.20%)
Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent			(0.70%)	(0.90%)