Note 16 - Income Taxes (Tables)

12 Months Ended

Sep. 30, 2024

Notes Tables

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

	YEAR ENDED SEPTEMBER 30,
	2024			2023
United States	$	(6,930	)	$	11,190
Foreign		466			1,379
	$	(6,464	)	$	12,569

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

	YEAR ENDED SEPTEMBER 30,
	2024		2023
Current
Federal	$	—	$	63
Foreign		55		244
State		41		59
		96		366
Deferred:
Federal		—		—
Foreign		18		(3	)
		18		(3	)
	$	114	$	363

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

	YEAR ENDED SEPTEMBER 30, 2024						YEAR ENDED SEPTEMBER 30, 2023
	Amount			Percent			Amount			Percent
Expense (benefit) for U.S. federal income tax at statutory rate	$	(1,357	)		21.0	%	$	2,639			21.0	%
Research and experimentation tax credit		(572	)		8.8	%		(480	)		(3.9	)%
State income taxes, net of federal income tax benefit		32			(0.5	)%		302			2.5	%
Change in valuation allowance		1,934			(29.9	)%		(2,459	)		(19.6	)%
Foreign earnings tax		125			(1.9	)%		—			—
Stock compensation		(210	)		3.2	%		171			1.4	%
Impact due to foreign currency translation		(44	)		0.7	%		51			0.4	%
Other items		206			(3.2	)%		139			1.1	%
Total tax expense and effective tax rate	$	114			(1.8	)%	$	363			2.9	%

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

	YEAR ENDED SEPTEMBER 30,
	2024			2023
Deferred income tax assets:
Inventories	$	5,447		$	8,269
Loss and tax credit carryforwards		31,850			29,581
Accrued compensation		733			870
R&D expenditure capitalization		3,064			1,538
Intangible assets		290			—
Property and equipment		331			504
Other reserves		456			590
Subtotal deferred income tax assets		42,171			41,352
Valuation allowance		(40,851	)		(38,917	)
Net deferred income tax assets		1,320			2,435
Deferred income tax liabilities:
Intangible assets		—			(292	)
Property and equipment		(1,249	)		(2,153	)
Other		(105	)		(6	)
Total deferred income tax liabilities		(1,354	)		(2,451	)
Net deferred income tax liabilities	$	(34	)	$	(16	)