CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (12,178)	$ (8,517)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	1,219	1,131
Amortization of operating lease right-of-use asset	187	219
Amortization of finance lease right-of-use asset	114	94
Amortization of deferred financing costs, debt discounts and debt premiums	4	3
Gain on forgiveness of debt		(794)
Gain on settlement of liability	(25)	(53)
Stock-based compensation	3,801	1,879
Value of stock issued in payment of services		150
Provision for losses on doubtful accounts	406	(150)
Warrant revaluation	(606)	(269)
Derecognition of finance lease right-of-use asset		125
Changes in operating assets and liabilities:
Accounts receivable	(745)	327
Inventories	(144)	(214)
Other assets	491	(349)
Accounts payable	165	112
Operating lease liabilities	(182)	(225)
Deferred revenue	101	12
Accrued expenses	(329)	(58)
Net cash used in operating activities	(7,721)	(6,577)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(277)	(682)
Net cash used in investing activities	(277)	(682)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(151)	(130)
Deposits on finance lease right-of-use assets		(39)
Issuance of common stock, net of issuance costs	129	16,207
Proceeds from exercise of warrants	11	400
Proceeds from exercise of stock options		3
Principal payments on long-term debt	(214)	(40)
Payments on common stock warrant liabilities		(130)
Net cash flows (used in) provided by financing activities	(225)	16,271
NET CHANGE IN CASH	(8,223)	9,012
CASH AT BEGINNING OF PERIOD	11,668	2,656
CASH AT END OF PERIOD	3,445	11,668
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	45	34
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Purchases of equipment financed through accounts payable	34	58
Prepaid insurance financed with loan	413
Operating lease right-of-use assets obtained in exchange for operating lease obligations	92	771
Finance lease right-of-use assets obtained in exchange for finance lease obligations	$ 12	347
Write-off warrant liability in conjunction with warrant exercises		$ 320