Income Taxes (Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Current:
Federal	$ 709	$ 950	$ 526
State	572	290	57
Foreign	1,128	746	1,412
Deferred:
U.S.	(2,911)	(825)	(536)
Foreign	(446)	26	160
Income tax (benefit) expense	$ (948)	$ 1,187	$ 1,619