Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net Income (Loss)	$ (1,167)	$ (1,333)	$ (2,486)	$ (2,821)	$ (2,500)	$ (5,307)	$ (10,300)
Adjustments to reconcile net loss to net cash used in operating activities:
Other income	0		0		0	(30)
Depreciation	8		43		16	87
Stock-based compensation	23		54		49	98
Provision for doubtful accounts receivable	21		5		50	(4)
Provision for slow-moving and obsolete inventories	(107)		(185)		(130)	(56)
Provision for warranties	3		51		(37)	21
Amortization of loan discounts and origination fees	47		91		109	160
Changes in operating assets and liabilities (sources / (uses) of cash):
Accounts receivable	93		184		(403)	101
Inventories	(259)		384		303	754
Short-term deposits	0		47		(23)	59
Prepaid and other assets	454		96		460	116
Accounts payable	884		(777)		857	(716)
Accrued and other liabilities	(152)		(149)		(86)	(360)
Deferred revenue	0		0		0	(268)
Total adjustments	1,015		(156)		1,165	(38)
Net cash used in operating activities	(152)		(2,642)		(1,335)	(5,345)	(6,700)
Cash flows from investing activities:
Acquisitions of property and equipment	0		(2)		0	(37)
Net cash used in investing activities	0		(2)		0	(37)
Cash flows from financing activities (sources / (uses) of cash):
Proceeds from the issuance of common stock and warrants	1,304		3,500		4,329	3,500
Offering costs paid on the issuance of common stock and warrants	0		(334)		0	(334)
Costs related to reverse stock-split	(16)		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		5		0	5
Deferred financing costs	0		(234)		0	(234)
Net payments on proceeds from the credit line borrowings - Credit Facilities	(121)		(1,170)		(1,214)	(273)
Net cash provided by financing activities	1,167		3,357		2,599	3,638
Net increase (decrease) in cash	1,015		713		1,264	(1,744)
Cash, beginning of period	301	52	225	2,682	52	2,682	2,682
Cash, end of period	1,316	$ 301	938	$ 225	1,316	938	$ 52
2021 Streeterville Note
Cash flows from financing activities (sources / (uses) of cash):
Repayments of notes payable	0		(410)		0	(1,025)
2022 Streeterville Note
Cash flows from financing activities (sources / (uses) of cash):
Repayments of notes payable	0		0		(500)	0
Proceeds from Notes Payable	$ 0		$ 2,000		$ 0	$ 2,000