CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Common Stock	Treasury Stock	Additional Paid in Capital	Retained Earnings	Total
Balance at Sep. 30, 2015	$ 7,061	$ (7,680,969)	$ 15,509,199	$ 53,527,606	$ 61,362,897
Balance (in shares) at Sep. 30, 2015	706,109	(85,005)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(654,678)	(654,678)
Dividends on convertible preferred stock				(160,360)	(160,360)
Compensation expense and issuance of stock in connection with equity-based awards	$ 136		1,117,450		1,117,586
Compensation expense and issuance of stock in connection with equity-based awards (in shares)	13,637
Proceeds from the exercise of stock options	$ 987		2,898,905		2,899,892
Proceeds from the exercise of stock options (in shares)	98,707
Repurchase of common stock		$ (4,795,412)			(4,795,412)
Repurchase of common stock (in shares)		(56,391)
Net income				5,980,673	5,980,673
Balance at Sep. 30, 2016	$ 8,184	$ (12,476,381)	19,525,554	58,693,241	$ 65,750,598
Balance (in shares) at Sep. 30, 2016	818,453	(141,396)			677,057
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(706,906)	$ (706,906)
Compensation expense and issuance of stock in connection with equity-based awards	$ 130		1,300,365		1,300,495
Compensation expense and issuance of stock in connection with equity-based awards (in shares)	12,985
Repurchase of common stock		$ (1,124,921)			(1,124,921)
Repurchase of common stock (in shares)		(12,036)
Net income				2,949,576	2,949,576
Balance at Sep. 30, 2017	$ 8,314	$ (13,601,302)	$ 20,825,919	$ 60,935,911	$ 68,168,842
Balance (in shares) at Sep. 30, 2017	831,438	(153,432)			678,006