CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from Operating Activities:
Net loss	$ (4,384,000)	$ (21,941,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	345,000	1,903,000
Bad debt (recovery) expense	(52,000)	118,000
Non-cash lease expense from right-of-use assets	125,000	349,000
Stock-based compensation	504,000	146,000
Forfeiture of unvested stock options	0	(85,000)
Loss (gain) on disposal of assets	3,000	(2,000)
Casualty loss on inventory	0	483,000
Impairment charges - property and equipment	0	61,000
Impairment charges - intangible assets	259,000	5,133,000
Impairment charges - right-of use assets	0	179,000
Impairment charges - goodwill	0	7,367,000
Changes in assets and liabilities:
Accounts receivable	43,000	316,000
Prepaid expenses and other current assets	406,000	432,000
Inventory	484,000	615,000
Other assets	28,000	69,000
Accounts payable	27,000	(75,000)
Accrued expenses and other current liabilities	(170,000)	115,000
Deferred revenue	(392,000)	(614,000)
Lease liabilities	(219,000)	(503,000)
Net cash used in operating activities	(2,993,000)	(5,934,000)
Cash flows from Investing Activities:
Proceeds on sale of equipment	0	30,000
Purchases of property and equipment	0	(11,000)
Net cash provided by investing activities	0	19,000
Cash flows from Financing Activities:
Proceeds from private placement, net of issuance costs	5,364,000	0
Net proceeds from exercise of common stock warrants	534,000	0
Net cash provided by financing activities	5,898,000	0
Net increase (decrease) in cash and cash equivalents	2,905,000	(5,915,000)
Cash and restricted cash at beginning of year	3,085,000	9,000,000
Cash and cash equivalents at end of year	5,990,000	3,085,000
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	20,000	7,000
Cash paid for income taxes	31,000	0
Reconciliation of cash and cash equivalents
Cash	5,490,000	3,085,000
Current certificates of deposit	500,000	0
Total cash and cash equivalents	5,990,000	3,085,000
Non-cash investing and financing activities:
New operating lease agreement	0	11,000
Preferred stock dividends	343,000	0
Warrant modification	25,000	0
Induced exercise of common stock warrants	751,000	0
Common stock issued for conversion of Preferred Stock and accrued dividends	$ 209,000	$ 0