Net Income Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income (loss)	$ 997,117	$ 511,259	$ 202,499	$ 139,421	$ (414,378)	$ (1,041,037)	$ (1,316,871)	$ (881,619)	$ 1,850,296	$ (3,653,905)	$ 4,568,627
Denominator:
Basic weighted average shares									16,867,550	16,805,991	16,742,461
Dilutive effect of share-based awards									74,897		113,182
Diluted weighted average shares									16,942,447	16,805,991	16,855,644
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.06	$ 0.03	$ 0.01	$ 0.01	$ (0.03)	$ (0.06)	$ (0.08)	$ (0.05)	$ 0.11	$ (0.22)	$ 0.27
Diluted (in dollars per share)	$ 0.06	$ 0.03	$ 0.01	$ 0.01	$ (0.03)	$ (0.06)	$ (0.08)	$ (0.05)	$ 0.11	$ (0.22)	$ 0.27
Options to purchase common stock outstanding (in shares)	550,834				550,834				550,834	550,834	586,834
Anti-dilutive options to purchase common stock excluded from the computation of diluted earnings per share (in shares)											336,961
Delta | Other income
Net income (loss) per common share:
Reminder of amount paid											$ 4,100,000
RSU
Net income (loss) per common share:
Restricted stock units outstanding ( in shares)	0				0				0	0	0