CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from Operating Activities:
Net loss	$ (21,941,000)	$ (9,051,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,903,000	2,736,000
Bad debt expense	118,000	321,000
Non-cash lease expense from right-of-use assets	349,000	495,000
Stock-based compensation	146,000	597,000
Stock-based expense for services	0	390,000
Forfeiture of unvested stock options	(85,000)	0
Gain on disposal of assets	(2,000)	0
Gain on extinguishment of liabilities	0	(2,675,000)
Casualty loss on inventory	483,000	0
Impairment charges - property and equipment	61,000	98,000
Impairment charges - intangible assets	5,133,000	207,000
Impairment charges - right-of use assets	179,000	0
Impairment charges - goodwill	7,367,000	0
Changes in assets and liabilities:
Accounts receivable	316,000	1,996,000
Prepaid expenses and other current assets	432,000	(901,000)
Inventory	615,000	(390,000)
Other assets	69,000	(3,000)
Accounts payable	(75,000)	(54,000)
Accrued expenses and other current liabilities	115,000	(19,000)
Deferred revenue	(614,000)	(559,000)
Lease liabilities	(503,000)	(920,000)
Net cash used in operating activities	(5,934,000)	(7,732,000)
Cash flows from Investing Activities:
Proceeds on sale of equipment	30,000	1,000
Purchases of property and equipment	(11,000)	(50,000)
Net cash provided by (used in) investing activities	19,000	(49,000)
Cash flows from Financing Activities:
Proceeds from stock issuance, net of offering costs	0	11,504,000
Net cash provided by financing activities	0	11,504,000
Net (decrease) increase in cash and restricted cash	(5,915,000)	3,723,000
Cash and restricted cash at beginning of year	9,000,000	5,277,000
Cash and restricted cash at end of year	3,085,000	9,000,000
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	7,000	9,000
Reconciliation of cash and restricted cash
Cash	3,085,000	8,939,000
Current portion of restricted cash	0	61,000
Total cash and restricted cash	3,085,000	9,000,000
Non-cash investing and financing activities:
New operating lease agreement	11,000	60,000
Modification of operating lease agreement	0	192,000
Warrant modification	0	37,000
Accrued preferred stock dividends	0	1,000
Inducement to convert Series A-2 Preferred Stock to common	$ 0	$ 300,000