Note 15 - Warrants (Details Textual) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Class of Warrant or Right, Available to Purchase	412,779
Class of Warrant or Right, Outstanding, Weighted Average Exercise Price	$ 14.93
Class of Warrant or Right, Outstanding	0	412,779
Class of Warrant or Right, Issued During Period	0	0
Class of Warrant or Right, Expired During Period	0	0
Class of Warrant or Right, Exercised During Period	0	0
Class of Warrant or Right, Redeemed During Period	0	0