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Note 8 - Stockholders' Equity (Tables)

3 Months Ended

Dec. 31, 2023

Notes Tables

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

		Three Months Ended December 31,
		2023				2022
Cost of revenue		$	-			$	5
Operating expenses			112				88
		$	112			$	93

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
Investors		3/12/2019			872,625			$	4.00		9/12/2024
Investors		3/12/2019			13,738			$	0.05		9/12/2024
Placement Agent		3/12/2019			11,992			$	4.00		9/12/2024
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
					1,702,888

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

		Non-Board
Weighted-average fair value per share option		$	1.12
Expected life (in years)			6.0
Volatility			108.5	%
Risk-free interest rate			3.8	%
Dividend yield			0.0	%

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

		Restricted Stock				Stock Options								Stock Warrants
		Awards				Awards				Weighted Average Exercise Price				Warrants				Weighted Average Exercise Price
Outstanding, October 1, 2023			200,000				1,831,515			$	2.56				1,757,629			$	3.64
Granted			-				-				-				-				-
Exercised			-				-				-				-				-
Forfeited			-				(29,018	)			1.58				-				-
Expired			-				(18	)			1,362.50				(54,741	)			10.17
Outstanding, December 31, 2023			200,000				1,802,479			$	2.56				1,702,888			$	3.43
Options vested and exercisable, December 31, 2023							1,192,642			$	3.14

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