Note 17 - Income Taxes - Reconciliation of Actual Income Tax Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Benefit for U.S. federal income tax at statutory rate	$ (1,961)	$ (1,357)
Benefit for U.S. federal income tax at statutory rate, percent	21.00%	21.00%
Research and experimentation tax credit	$ (585)	$ (572)
Research and experimentation tax credit, percent	6.30%	8.80%
State income taxes, net of federal income tax benefit	$ 46	$ 32
State income taxes, net of federal income tax benefit, percentage	(0.50%)	(0.50%)
Change in valuation allowance	$ 2,930	$ 1,934
Change in valuation allowance, percentage	(31.40%)	(29.90%)
Foreign earnings tax	$ 169	$ 125
Foreign earnings tax, percentage	(1.80%)	(1.90%)
Stock compensation	$ (111)	$ (210)
Stock compensation, percentage	1.20%	3.20%
Impact due to foreign currency translation	$ 171	$ (44)
Impact due to foreign currency translation	(1.80%)	0.70%
Other items	$ (271)	$ 206
Other items, percentage	2.90%	(3.20%)
Income Tax Expense (Benefit)	$ 388	$ 114
Total tax expense and effective tax rate, percentage	(4.10%)	(1.80%)

Percentage 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 research and experimentation tax credit.

No definition available.