Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash Flows From Operating Activities:
Net loss	$ (1,488,000)	$ (1,293,000)	$ (1,643,000)	$ (1,598,000)	$ (2,781,000)	$ (3,241,000)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization					628,000	817,000
Bad debt expense					(5,000)	9,000
Other income						(25,000)
Gain on disposal of assets	(79,000)		(135,000)		(199,000)	(129,000)
Inventory reserve					(16,000)	(17,000)
Stock dividend payable					(75,000)	(75,000)
Amortization of debt issuance costs					97,000
Interest accrued to secured credit facilities					18,000	158,000
Interest accrued to notes payable					319,000
Payment of accrued interest on secured credit facilities						(117,000)
Interest accrued to secured credit facilities, related party					122,000	247,000
Payment of accrued interest on secured credit facilities, related party					(81,000)	(243,000)
Issuance of common stock for services by third parties					4,000	83,000
Issuance of common stock for services by employees					65,000	60,000
Changes in operating assets and liabilities:
Trade receivables, net					(453,000)	50,000
Inventories					185,000	848,000
Prepaid expenses and other assets					210,000	(216,000)
Right-of-use assets					462,000	497,000
Accounts payable					600,000	637,000
Accrued liabilities					167,000	(51,000)
Other liabilities, related party					81,000	458,000
Deferred revenue					(37,000)	136,000
Net lease liabilities					(448,000)	(525,000)
Net cash used in operating activities					(1,137,000)	(639,000)
Cash Flows From Investing Activities:
Proceeds from sale of fixed assets					97,000	146,000
Purchases of property and equipment					(2,200)	(73,000)
Net cash provided by investing activities					95,000	73,000
Cash Flows From Financing Activities:
Proceeds from issuance of stock						651,000
Proceeds from secured credit facilities					1,100,000	31,000
Payments of debt issuance on secured credit facilities					(41,000)
Net cash provided by financing activities					1,059,000	682,000
Net increase in cash					17,000	116,000
Cash at the beginning of the period		$ 403,000		$ 723,000	403,000	723,000	$ 723,000
Cash at the end of the period	$ 420,000		$ 839,000		420,000	839,000	$ 403,000
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest					81,000	441,000
Cash paid for amounts included in measurement of lease liabilities					249,000	687,000
Supplemental Disclosure of Non-Cash Financing Activity
Exchange of assets for services						42,000
Future proceeds related to installment sales of equipment					$ 396,000	$ 128,000