Treasury Stock - Schedule of Treasury Stock Transactions (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Shares
Beginning Balance (in shares)	216,188	177,315	100,610
Purchased (in shares)	752,234	72,266	104,145
Issued to Employees and Directors (in shares)	(28,790)	(33,393)	(27,440)
Ending Balance (in shares)	939,632	216,188	177,315
Cost
Beginning Balance	$ 7,536,000	$ 6,502,000	$ 4,585,000
Purchased	25,576,000	2,214,756	3,064,000
Issued to Employees and Directors	(1,169,000)	(1,181,000)	(1,147,000)
Ending Balance	$ 31,943,000	$ 7,536,000	$ 6,502,000