Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net Income (Loss)	$ (944)	$ (1,167)	$ (1,333)	$ (2,662)	$ (2,486)	$ (2,821)	$ (3,444)	$ (7,969)	$ (10,300)
Adjustments to reconcile net loss to net cash used in operating activities:
Other income	(40)			0			(40)	(30)
Depreciation	8			42			24	129
Stock-based compensation	(13)			17			36	115
Provision for doubtful accounts receivable	0			1			50	(3)
Provision for slow-moving and obsolete inventories	62			220			(68)	164
Provision for warranties	0			(74)			(37)	(53)
Amortization of loan discounts and origination fees	59			87			168	247
Loss on write-off of property and equipment	0			76			0	76
Changes in operating assets and liabilities (sources / (uses) of cash):
Accounts receivable	(46)			139			(449)	240
Inventories	340			792			643	1,546
Short-term deposits	(117)			(110)			(140)	(51)
Prepaid and other assets	28			46			488	162
Accounts payable	(459)			629			398	(92)
Accrued and other liabilities	87			(101)			1	(461)
Deferred revenue	0			7			0	(261)
Total adjustments	(91)			1,771			1,074	1,728
Net cash used in operating activities	(1,035)			(891)			(2,370)	(6,241)	(6,700)
Cash flows from investing activities:
Acquisitions of property and equipment	(27)			(9)			(27)	(41)
Net cash used in investing activities	(27)			(9)			(27)	(41)
Cash flows from financing activities (sources / (uses) of cash):
Proceeds from the issuance of common stock and warrants	1,750			0			6,079	3,500
Offering costs paid on the issuance of common stock and warrants	0			0			0	(334)
Costs related to reverse stock-split	0			0			(16)	0
Principal payments under finance lease obligations	0			0			0	(1)
Proceeds from exercise of stock options and employee stock purchase plan purchases	0			0			0	5
Proceeds from the related party promissory note payable	0			450			0	450
Deferred financing costs	0			(95)			0	(329)
Net payments on proceeds from the credit line borrowings - Credit Facilities	(188)			58			(1,402)	(215)
Net cash provided by financing activities	1,437			3			4,036	3,641
Net increase (decrease) in cash	375			(897)			1,639	(2,641)
Cash, beginning of period	1,316		$ 52	938		$ 2,682	52	2,682	2,682
Cash, end of period	1,691	$ 1,316		41	$ 938		1,691	41	$ 52
2021 Streeterville Note
Cash flows from financing activities (sources / (uses) of cash):
Repayments of notes payable	0			(410)			0	(1,435)
2022 Streeterville Note
Cash flows from financing activities (sources / (uses) of cash):
Repayments of notes payable	(125)			0			(625)	0
Proceeds from notes payable	$ 0			$ 0			$ 0	$ 2,000