Income Taxes (Summary of Provision (Benefit) for Income Taxes) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Federal	$ (3,642,000)	$ (1,388,000)	$ 204,000
State		19,000	20,000
Current	(3,642,000)	(1,369,000)	224,000
Federal	(3,611,000)	(9,763,000)	(13,240,000)
State	(1,036,000)	(2,349,000)	277,000
Deferred	(4,647,000)	(12,112,000)	(12,963,000)
Provision (benefit) for income taxes	$ (8,289,000)	$ (13,481,000)	$ (12,739,000)