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Earnings Per Share (Details) - USD ($)	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income (loss)	$ 202,499	$ 139,421	$ (1,316,871)	$ (881,619)	$ 341,920	$ (2,198,490)
Denominator:
Basic weighted average shares	16,860,568		16,800,244		16,850,584	16,791,687
Dilutive effect of share-based awards	15,152				7,576
Diluted weighted average shares	16,875,720		16,800,244		16,858,160	16,791,687
Earnings per common share:
Basic EPS (in dollars per share)	$ 0.01		$ (0.08)		$ 0.02	$ (0.13)
Diluted EPS (in dollars per share)	$ 0.01		$ (0.08)		$ 0.02	$ (0.13)
Options to purchase common stock outstanding (in shares)	550,834		556,834		550,834	556,834
Diluted weighted-average shares outstanding excluded from computation of diluted EPS (in shares)	300,834		574,167		425,834	580,501

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