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Note 15 - Parent Company Financial Information - Balance Sheets (Details) (Parentheticals) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, share authorized (in shares) 5,000,000 5,000,000
Common stock, share issued (in shares) 1,682,997 1,667,813
Common stock, share outstanding (in shares) 1,682,997 1,667,813
Parent Company [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, share authorized (in shares) 5,000,000 5,000,000
Common stock, share issued (in shares) 1,682,997 1,667,813
Common stock, share outstanding (in shares) 1,682,997 1,667,813