Note 14 - Shareholders' Equity (Details) - Dividends - 6 months ended Jun. 30, 2015 - $ / shares	Total
Dividend Declared on 01/15/2015 [Member]
Dividends Payable [Line Items]
Declaration date	Jan. 15, 2015
Record date	Feb. 02, 2015
Payment date	Feb. 16, 2015
Cash dividend per common share	$ 0.08
Dividend Declared on 04/16/2015 [Member]
Dividends Payable [Line Items]
Declaration date	Apr. 16, 2015
Record date	May 04, 2015
Payment date	May 18, 2015
Cash dividend per common share	$ 0.08