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Note 10 - Income Taxes - Reconciliation of Income Taxes (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income taxes computed at the federal statutory rate	$ (231,000)	$ (499,000)
Change in valuation allowance	197,000	(66,000)
Expired net operating loss carryforwards	283,000	487,000
Nondeductible compensation, interest expense and other	21,000	99,000
State income taxes, net of federal tax benefit	(24,000)	(36,000)
Change in R&D credit carryover	(98,000)	(98,000)
Stock options and other prior year true-ups	48,000	(75,000)
Other	1,600	1,840
Provision (benefit) for income taxes	$ 197,600	$ (186,160)

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the expiration of net operating loss carryforwards.

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The amount of change in research and development carryover during the period.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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