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Net Income Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income (loss)	$ (186,045)	$ 19,220	$ 5,930,425	$ (1,194,974)	$ 397,129	$ 226,797	$ 1,578,313	$ (215,438)	$ 4,568,627	$ 1,986,801	$ (5,866,134)
Denominator:
Basic weighted average shares									16,742,461	16,927,055	16,924,189
Dilutive effect of share-based awards									113,182	112,241
Diluted weighted average shares									16,855,644	17,039,296	16,924,189
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.01)		$ 0.35	$ (0.07)	$ 0.02	$ 0.01	$ 0.09	$ (0.01)	$ 0.27	$ 0.12	$ (0.35)
Diluted (in dollars per share)	$ (0.01)		$ 0.35	$ (0.07)	$ 0.02	$ 0.01	$ 0.09	$ (0.01)	$ 0.27	$ 0.12	$ (0.35)
Options to purchase common stock outstanding (in shares)	586,834				589,168				586,834	589,168
Anti-dilutive options to purchase common stock excluded from the computation of diluted earnings per share (in shares)									336,961	339,581
RSU
Net income (loss) per common share:
Restricted stock units outstanding ( in shares)	0				0				0	0

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