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Note 14 - Earnings (Loss) Per Common Share - Potentially Dilutive Shares (Details) - shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Potentially dilutive securities (in shares) 1,143,647 2,103
Warrant [Member]      
Potentially dilutive securities (in shares) 1,041,337
Series B Convertible Preferred Stock [Member]      
Potentially dilutive securities (in shares) 102,310
Non-Vested Shares [Member]      
Potentially dilutive securities (in shares) 2,103