CONSOLIDATED STATEMENTS OF CASH FLOWS	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Cash flows from Operating Activities:
Net loss	$ (9,051,000)	$ (7,421,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,736,000	3,140,000
Bad debt expense	321,000	168,000
Amortization of debt discount	0	56,000
Right-of-use assets	495,000	1,001,000
Stock-based compensation	597,000	198,000
Stock-based expense for services	390,000	58,000
Gain on extinguishment of lease liability	(227,000)	0
Gain on extinguishment of debt	(2,448,000)	(3,117,000)
Impairment charges - property and equipment	98,000	144,000
Impairment charges - intangible assets	207,000	0
Impairment charges - right-of use assets	0	465,000
Impairment charges - goodwill	0	541,000
Changes in assets and liabilities:
Accounts receivable	1,996,000	(792,000)
Prepaid expenses and other current assets	(390,000)	273,000
Inventory	(901,000)	820,000
Other assets	(3,000)	(35,000)
Accounts payable	(54,000)	(335,000)
Accrued expenses and other current liabilities	(19,000)	(415,000)
Deferred revenue	(559,000)	(178,000)
Operating lease liability	(920,000)	(1,134,000)
Other long-term liabilities	0	(3,000)
Net cash used in operating activities	(7,732,000)	(6,566,000)
Cash flows from Investing Activities:
Proceeds on sale of equipment	1,000	7,000
Purchases of property and equipment	(50,000)	(38,000)
Net cash used in investing activities	(49,000)	(31,000)
Cash flows from Financing Activities:
Principal payments under borrowing arrangement	0	(2,500,000)
Proceeds from issuance of common stock, net of offering costs	11,504,000	7,371,000
Proceeds from PPP Loan	0	2,417,000
Shares withheld to cover tax liability	0	(16,000)
Net cash provided by financing activities	11,504,000	7,272,000
Net increase in cash and restricted cash	3,723,000	675,000
Cash and restricted cash at beginning of year	5,277,000	4,602,000
Cash and restricted cash at end of year	9,000,000	5,277,000
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	9,000	213,000
Reconciliation of cash and restricted cash
Cash	8,939,000	5,058,000
Current portion of restricted cash	61,000	158,000
Restricted cash included in other assets, net of current portion	0	61,000
Total cash and restricted cash	9,000,000	5,277,000
Non-cash investing and financing activities:
Issuance of preferred stock in exchange for accrued dividends	0	99,000
New operating lease agreement	60,000	0
Modification of operating lease agreement	192,000	0
Transfer of assets from inventory to property and equipment	0	78,000
Accrued preferred stock dividends	1,000	17,000
Inducement to convert Series A-2 Preferred Stock to common	300,000	0
Common stock issued for conversion of preferred stock	2,000	0
Warrant modification	$ 37,000	$ 0