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Earnings (Loss) Per Share (Schedule of Computation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Numerator:                      
Net income (loss) attributable to common shareholders $ (749,694) $ 106,166 $ (48,044) $ (253,111) $ 151,059 $ 126,613 $ 407,398 $ 46,281 $ (944,683) $ 731,351 $ 2,423,723
Denominator:                      
Weighted-average shares outstanding – basic (in shares)                 16,236,525 16,715,970 17,617,765
Dilutive effect of restricted stock and stock options (in shares)                 0 378,784 281,867
Weighted-average shares outstanding – diluted (in shares)                 16,236,525 17,094,754 17,899,632