Condensed Consolidated Unaudited Statements of Shareholders' Equity - USD ($)	Common Stock	Treasury Stock	Additional Paid in Capital	Retained Earnings	Total
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)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(458,859)	(458,859)
Compensation expense and issuance of stock in connection with equity-based awards	$ 127		1,210,643		1,210,770
Compensation expense and issuance of stock in connection with equity-based awards (in shares)	12,651
Repurchase of common stock		$ (644,528)			(644,528)
Repurchase of common stock (in shares)		(6,653)
Net income				1,818,990	1,818,990
Balance at Mar. 31, 2018	$ 8,441	$ (14,245,830)	22,036,562	62,296,042	70,095,215
Balance (in shares) at Mar. 31, 2018	844,089	(160,085)
Balance at Dec. 31, 2017	$ 8,441	$ (13,616,477)	22,009,620	62,086,133	70,487,717
Balance (in shares) at Dec. 31, 2017	844,089	(153,603)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(128,990)	(128,990)
Compensation expense and issuance of stock in connection with equity-based awards			26,942		26,942
Repurchase of common stock		$ (629,353)			(629,353)
Repurchase of common stock (in shares)		(6,482)
Net income				338,899	338,899
Balance at Mar. 31, 2018	$ 8,441	$ (14,245,830)	22,036,562	62,296,042	70,095,215
Balance (in shares) at Mar. 31, 2018	844,089	(160,085)
Balance at Sep. 30, 2018	$ 8,441	$ (21,324,752)	22,069,098	63,848,030	$ 64,600,817
Balance (in shares) at Sep. 30, 2018	844,089	(228,312)			615,777
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(413,100)	$ (413,100)
Compensation expense and issuance of stock in connection with equity-based awards	$ 120		1,079,274		1,079,394
Compensation expense and issuance of stock in connection with equity-based awards (in shares)	11,950
Repurchase of common stock		$ (3,186,846)			(3,186,846)
Repurchase of common stock (in shares)		(34,959)
Net income				2,768,536	2,768,536
Balance at Mar. 31, 2019	$ 8,561	$ (24,511,598)	23,148,372	66,203,466	$ 64,848,801
Balance (in shares) at Mar. 31, 2019	856,039	(263,271)			592,768
Balance at Dec. 31, 2018	$ 8,561	$ (22,242,837)	23,110,713	64,796,415	$ 65,672,852
Balance (in shares) at Dec. 31, 2018	856,039	(238,744)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(116,164)	(116,164)
Compensation expense and issuance of stock in connection with equity-based awards			37,659		37,659
Repurchase of common stock		$ (2,268,761)			(2,268,761)
Repurchase of common stock (in shares)		(24,527)
Net income				1,523,215	1,523,215
Balance at Mar. 31, 2019	$ 8,561	$ (24,511,598)	$ 23,148,372	$ 66,203,466	$ 64,848,801
Balance (in shares) at Mar. 31, 2019	856,039	(263,271)			592,768