Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from Operating Activities:
Net loss	$ (4,043,000)	$ (4,384,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	0	345,000
Bad debt expense (recovery)	2,000	(52,000)
Non-cash lease expense from right-of-use assets	17,000	125,000
Stock-based compensation	62,000	504,000
Loss on disposal of assets	0	3,000
Impairment charges - intangible assets	0	259,000
Changes in assets and liabilities:
Accounts receivable	236,000	43,000
Prepaid expenses and other current assets	125,000	406,000
Inventory	239,000	484,000
Other assets	6,000	28,000
Accounts payable	(107,000)	27,000
Accrued expenses and other current liabilities	195,000	(170,000)
Deferred revenue	(121,000)	(392,000)
Lease liabilities	(17,000)	(219,000)
Net cash used in operating activities	(3,406,200)	(2,993,000)
Cash flows from Financing Activities:
Net cash provided by financing activities	2,381,000	5,898,000
Net (decrease) increase in cash and cash equivalents	(1,025,000)	2,905,000
Cash and restricted cash at beginning of year	5,990,000	3,085,000
Cash and cash equivalents at end of year	4,965,000	5,990,000
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	0	20,000
Cash paid for income taxes	0	31,000
Reconciliation of cash and cash equivalents
Cash	4,465,000	5,490,000
Current certificates of deposit	500,000	500,000
Total cash and cash equivalents	4,965,000	5,990,000
Non-cash investing and financing activities:
Preferred stock dividends	89,000	343,000
Warrant modification	0	25,000
Induced exercise of common stock warrants	0	751,000
Conversion of Preferred Stock and Accrued Dividends [Member]
Non-cash investing and financing activities:
Common stock issued for conversion of Preferred Stock and accrued dividends	191,000	209,000
Preferred Warrants [Member]
Cash flows from Financing Activities:
Proceeds from preferred stock warrant exercises, net of issuance costs	1,478,000	5,364,000
Common Stock Warrants [Member]
Cash flows from Financing Activities:
Proceeds from preferred stock warrant exercises, net of issuance costs	$ 903,000	$ 534,000