Income Taxes (Summary of Provision (Benefit) for Income Taxes) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Federal	$ 314,000	$ 2,166,000	$ 2,053,000
State		83,000	111,000
Current	314,000	2,249,000	2,164,000
Federal	390,000	(8,597,000)	2,033,000
State	(15,000)	(1,363,000)	639,000
Deferred	375,000	(9,960,000)	2,672,000
Provision (benefit) for income taxes	$ 689,000	$ (7,711,000)	$ 4,836,000