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Note 12 - Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2024

Notes Tables

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

		Year Ended September 30,
		2024				2023
Cost of revenue		$	-			$	7
Operating expenses			505				395
Interest expense and other, net			53				169
Total		$	558			$	571

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Type		Issue Date		Shares				Price			Expiration
Financing (Montage)		10/10/2017			1,327			$	132.50		10/10/2025
Placement Agent		2/4/2021			31,564			$	3.88		2/4/2026
Investors		5/14/2021			592,106			$	2.51		11/16/2026
Placement Agent		5/14/2021			179,536			$	2.85		5/12/2026
Total					804,533

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2024								2023
		Board				Non-Board				Board				Non-Board
Weighted-average fair value per share option		$	0.67			$	0.67			$	0.84			$	0.90
Expected life (in years)			5.8				5.0				5.0				5.8
Volatility			108.5	%			96.1	%			88.5	%			90.7	%
Risk-free interest rate			4.0	%			4.2	%			4.1	%			4.0	%
Dividend yield			0.0	%			0.0	%			0.0	%			0.0	%

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

		Restricted Stock				Stock Options								Stock Warrants
										Weighted Average								Weighted Average
		Awards				Awards				Exercise Price				Warrants				Exercise Price
Outstanding, October 1, 2022			200,000				1,157,927			$	3.49				1,757,629			$	3.64
Granted			-				702,000				1.19				-				-
Exercised			-				-				-				-				-
Forfeited			-				(28,348	)			2.49				-				-
Expired			-				(64	)			1,873.44				-				-
Outstanding, September 30, 2023			200,000				1,831,515			$	2.56				1,757,629			$	3.64
Granted			-				330,000				0.83				-				-
Exercised			-				-				-				-				-
Forfeited			-				(53,518	)			1.50				-				-
Expired			-				(102	)			1,413.97				(953,096	)			2.85
Outstanding, September 30, 2024			200,000				2,107,895			$	2.25				804,533			$	2.85

Schedule of Nonvested Share Activity [Table Text Block]

						Weighted Average
						Grant-Date
		Shares				Fair Value
Unvested at October 1, 2023			683,418			$	1.10
Granted			330,000				0.67
Vested			(436,413	)			1.06
Forfeited/Cancelled			(13,000	)			1.07
Unvested at September 30, 2024			564,005			$	0.88

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Exercise Price		Number of Options				Weighted Average Remaining Contractual Life (Years)				Weighted Average Exercise Price				Aggregate Intrinsic Value
Options outstanding			2,107,895				7.7			$	2.25			$	105,000
Options exercisable			1,543,890				7.3			$	2.66			$	34,166

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