Note 8 - Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Current	$ (13,000)	$ (17,000)	$ 174,000
Deferred		1,534,000	(1,004,000)
	(13,000)	1,517,000	(830,000)
Income tax provision	8,000	119,000	684,000
Total provision (benefit) for income taxes	$ (5,000)	$ 1,636,000	$ (146,000)