Note 17 - Income Taxes (Tables)

12 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	YEAR ENDED SEPTEMBER 30,
	2025			2024
United States	$	(8,941	)	$	(6,930	)
Foreign		(395	)		466
	$	(9,336	)	$	(6,464	)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	YEAR ENDED SEPTEMBER 30,
	2025			2024
Current
Federal	$	—		$	—
Foreign		361			55
State		58			41
		419			96
Deferred:
Federal		—			—
Foreign		(31	)		18
		(31	)		18
	$	388		$	114

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	YEAR ENDED SEPTEMBER 30, 2025						YEAR ENDED SEPTEMBER 30, 2024
	Amount			Percent			Amount			Percent
Benefit for U.S. federal income tax at statutory rate	$	(1,961	)		21.0	%	$	(1,357	)		21.0	%
Research and experimentation tax credit		(585	)		6.3	%		(572	)		8.8	%
State income taxes, net of federal income tax benefit		46			(0.5	)%		32			(0.5	)%
Change in valuation allowance		2,930			(31.4	)%		1,934			(29.9	)%
Foreign earnings tax		169			(1.8	)%		125			(1.9	)%
Stock compensation		(111	)		1.2	%		(210	)		3.2	%
Impact due to foreign currency translation		171			(1.8	)%		(44	)		0.7	%
Other items		(271	)		2.9	%		206			(3.2	)%
Total tax expense and effective tax rate	$	388			(4.1	)%	$	114			(1.8	)%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	YEAR ENDED SEPTEMBER 30,
	2025			2024
Deferred income tax assets:
Inventories	$	4,684		$	5,447
Loss and tax credit carryforwards		34,129			31,850
Accrued compensation		652			733
R&D expenditure capitalization		4,366			3,064
Intangible assets		245			290
Property and equipment		321			331
Other reserves		590			456
Subtotal deferred income tax assets		44,987			42,171
Valuation allowance		(43,781	)		(40,851	)
Net deferred income tax assets		1,206			1,320
Deferred income tax liabilities:
Property and equipment		(1,210	)		(1,249	)
Other		—			(105	)
Total deferred income tax liabilities		(1,210	)		(1,354	)
Net deferred income tax liabilities	$	(4	)	$	(34	)