CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (8,517)	$ (10,598)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	1,131	1,093
Amortization of operating lease right-of-use asset	219	213
Amortization of finance lease right-of-use asset	94	50
Amortization of deferred financing costs, debt discounts and debt premiums	3	320
Gain on forgiveness of debt	(794)
Gain on settlement of liability	(53)	(77)
Loss on extinguishment of convertible notes		1,225
Stock-based compensation	1,879	703
Value of stock issued in payment of services	150
Provision for losses on doubtful accounts	(150)	1,339
Warrant revaluation	(269)	(13)
Derecognition of finance lease right-of-use asset	125
Gain from sale of fixed asset		(55)
Changes in operating assets and liabilities:
Accounts receivable	327	(1,639)
Inventories	(214)	(166)
Other assets	(349)	(59)
Accounts payable	112	(243)
Operating lease liabilities	(225)	(209)
Accrued expenses and other liabilities	(46)	682
Net cash used in operating activities	(6,577)	(7,434)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(682)	(151)
Proceeds from sale of fixed asset		55
Net cash used in investing activities	(682)	(96)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(130)	(56)
Deposits on finance lease right-of-use assets	(39)
Issuance of common stock, net of issuance costs	16,207	8,929
Proceeds from exercise of warrants	400
Proceeds from exercise of stock options	3
Proceeds from PPP Loan		787
Principal payments on long-term debt	(40)	(322)
Payments on common stock warrant liabilities	(130)
Net cash flows provided by financing activities	16,271	9,338
NET CHANGE IN CASH	9,012	1,808
CASH AT BEGINNING OF PERIOD	2,656	848
CASH AT END OF PERIOD	11,668	2,656
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	34	20
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Purchases of equipment financed through accounts payable	58
Equipment financed through finance lease obligations		22
Conversion of convertible debt, plus interest, into common stock		2,176
Prepaid insurance financed with loan		23
Write-off of beneficial conversion feature in conjunction with convertible note extinguishment		523
Operating lease right-of-use assets obtained in exchange for operating lease obligations	771	0
Finance lease right-of-use assets obtained in exchange for finance lease obligations	347	29
Write-off warrant liability in conjunction with warrant exercises	$ 320
Write-off of (debt premiums) debt discounts, net, in conjunction with convertible note conversions		$ (270)