Note 10 - Income Tax (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 0	$ 0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 68,000	0
Earliest Tax Year [Member]
Open Tax Year	2012
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 0	$ 0
Deferred Tax Assets, Valuation Allowance	$ 0
Effective Income Tax Rate Reconciliation, Percent	39.80%	38.80%	5.50%