Note 4 - Income Taxes (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
State and Local Jurisdiction [Member]
Deferred Tax Assets, Valuation Allowance	$ 1.2
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Income Tax Examination, Increase (Decrease) in Liability from Prior Year	$ 0.5
Deferred Tax Liabilities, Net	$ 72.9