Note 10 - Subsequent Events (Details Textual) - shares	Jul. 11, 2016	Jun. 30, 2016	Dec. 31, 2015
Subsequent Event [Member]
Dividends, Common Stock, Stock, Percentge	4.00%
Common Stock Dividends, Shares	134,177
Common Stock, Shares, Issued	5,763,944
Common Stock, Shares, Outstanding	5,763,944
Dividends, Common Stock, Stock, Percentge	4.00%
Common Stock, Shares, Issued		5,629,767	3,362,536