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Income Taxes (Tables)

12 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Abstract]

Summary of Pre-tax Income/(Loss)

Pre-tax income/(loss) was attributed to the following jurisdictions:

		Years ended September 30,
		2025				2024
Domestic operations		$	(18,660	)		$	(31,964	)
Foreign operations			667				(171	)
		$	(17,993	)		$	(32,135	)

Summary of Income Taxes

Income taxes consisted of the following:

		Years ended September 30,
		2025				2024
Current tax provision
Federal		$	—			$	—
State			(2	)			11
Foreign			121				109
Total current tax provision			119				120
Deferred provision
Federal			—				(390	)
State			—				(135	)
Total deferred provision			—				(525	)
Provision (benefit) for income taxes		$	119			$	(405	)

Summary of Reconciliation of Income Taxes

A reconciliation of income taxes at the federal statutory rate of 21% to the effective tax rate was as follows:

		Years ended September 30,
		2025				2024
Income taxes computed at the federal statutory rate		$	(3,780	)		$	(6,744	)
Change in valuation allowance			2,867				3,466
Nondeductible compensation, interest expense and other			(898	)			956
State income taxes, net of federal tax benefit			(583	)			(334	)
Change in R&D credit carryover			(407	)			(379	)
NOL expirations and other prior year true-ups			2,725				3,051
Foreign rate differential & foreign taxes			195				104
Tax impacts of Evertel acquisition accounting			—				(525	)
		$	119			$	(405	)

Summary of Significant Portion of Net Deferred Tax Asset

The types of temporary differences between the tax basis of assets and liabilities and their approximate tax effects that give rise to a significant portion of the net deferred tax asset as of September 30, 2025 and 2024 were as follows:

		September 30,
		2025				2024
Deferred tax assets
Net operating loss carryforwards		$	13,070			$	12,357
Research and development credit			4,242				4,639
Share-based compensation			543				562
Patents			1,859				1,770
Accruals and other			2,621				2,227
Capitalized R&E expenses			5,257				3,893
Allowances			327				199
Gross deferred tax assets			27,919				25,647
Deferred tax liabilities
Equipment			(144	)			(216	)
Operating ROU assets			(517	)			(619	)
Acquired intangible assets			(1,171	)			(1,592	)
Gross deferred tax liabilities			(1,832	)			(2,427	)
Less valuation allowance			(26,087	)			(23,220	)
Net deferred tax assets and liabilities		$	—			$	—

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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-Section 50
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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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