Income Taxes - Provision (benefit) for income taxes (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Current
Federal	$ (74,000)	$ 124,000
State	14,000	15,000
Foreign	(40,000)	(32,000)
Total current	(100,000)	107,000
Deferred
Federal	169,000	(183,000)
State	120,000	(1,508,000)
Foreign	(7,000)	(24,000)
Total deferred	282,000	(1,715,000)
Total provision (benefit)	$ 182,000	$ (1,608,000)