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Cash Dividends (Details) - USD ($)
9 Months Ended
May 11, 2017
Sep. 30, 2017
Sep. 30, 2016
Apr. 27, 2017
Apr. 13, 2017
Dec. 31, 2016
Apr. 26, 2016
Apr. 12, 2016
Mar. 25, 2016
Cash Dividends (Textual)                  
Common stock, shares outstanding   9,234,580   9,154,243   9,146,937   9,008,855  
Dividends paid to common shareholders $ 549,255 $ 549,255 $ 540,531            
Dividends aggregating amount paid             $ 540,531    
Dividends declared per common share         $ 0.06       $ 0.06