Note 13 - Income Taxes - Open Tax Years (Details)	12 Months Ended
	Dec. 31, 2016
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year	2013
Domestic Tax Authority [Member] | Latest Tax Year [Member]
Open Tax Year	2016
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year	2012
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Open Tax Year	2016