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Earnings Per Share (Details) - USD ($)	3 Months Ended				6 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income	$ 438,105	$ 327,908	$ 202,499	$ 139,421	$ 766,013	$ 341,920
Denominator:
Basic weighted average shares	16,931,138		16,860,568		16,920,087	16,850,584
Dilutive effect of share-based awards	192,250		15,152		182,396	7,576
Diluted weighted average shares	17,123,388		16,875,720		17,102,483	16,858,160
Earnings per common share:
Basic EPS (in dollars per share)	$ 0.03		$ 0.01		$ 0.05	$ 0.02
Diluted EPS (in dollars per share)	$ 0.03		$ 0.01		$ 0.04	$ 0.02
Options to purchase common stock outstanding (in shares)	548,500		550,834		548,500	550,834
Diluted weighted-average shares outstanding excluded from computation of diluted EPS (in shares)	0		300,834		0	425,834

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