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Net Income Per Share (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Numerator:                      
Net income (loss) $ 397,129 $ 226,797 $ 1,578,313 $ (215,438) $ (2,563,812) $ (3,531,973) $ (364,091) $ 593,742 $ 1,986,801 $ (5,866,134) $ 200,268
Denominator:                      
Basic weighted average shares                 16,927,055 16,924,189 16,927,879
Dilutive effect of share-based awards                 112,241   221,227
Diluted weighted average shares                 17,039,296 16,924,189 17,149,106
Net income (loss) per common share:                      
Basic (in dollars per share) $ 0.02 $ 0.01 $ 0.09 $ (0.01) $ (0.15) $ (0.21) $ (0.02) $ 0.04 $ 0.12 $ (0.35) $ 0.01
Diluted (in dollars per share) $ 0.02 $ 0.01 $ 0.09 $ (0.01) $ (0.15) $ (0.21) $ (0.02) $ 0.03 $ 0.12 $ (0.35) $ 0.01
Options to purchase common stock outstanding (in shares) 589,168       645,168       589,168 645,168  
Anti-dilutive options to purchase common stock excluded from the computation of diluted earnings per share (in shares)                 339,581   55,666
RSU                      
Net income (loss) per common share:                      
Restricted stock units outstanding ( in shares) 67,115       0       67,115 0