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Earnings Per Share (Schedule of Computation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Numerator:                      
Net income (loss) attributable to common shareholders $ 151,059 $ 126,613 $ 407,398 $ 46,281 $ 668,913 $ 745,920 $ 722,570 $ 286,320 $ 731,351 $ 2,423,723 $ (2,104,614)
Denominator:                      
Weighted-average shares outstanding – basic (in shares)                 16,715,970 17,617,765 18,332,997
Dilutive effect of restricted stock and stock options (in shares)                 378,784 281,867 0
Weighted-average shares outstanding – diluted (in shares)                 17,094,754 17,899,632 18,332,997