Note 5 - Goodwill and Intangibles (Details Textual) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill Impairment Loss, Goodwill Balance Percent	100.00%
Finite-Lived Intangible Asset, Useful Life		12 years
Amortization of Intangible Assets			$ 2.1	$ 2.9