CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,030)	$ (4,584)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	310	302
Amortization of operating lease right-of-use asset	49	46
Amortization of finance lease right-of-use asset	23	34
Amortization of deferred financing costs, debt discounts and debt premiums		1
Gain on settlement of liability		(1)
Stock-based compensation	450	2,232
Provision for losses on doubtful accounts	12	78
Warrant revaluation		(222)
Changes in operating assets and liabilities:
Accounts receivable	166	(535)
Inventories	162	42
Other assets	84	111
Accounts payable	141	448
Operating lease liabilities	(48)	(45)
Deferred revenue	5	3
Accrued expenses	101	(244)
Net cash used in operating activities	(1,575)	(2,334)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(22)	(10)
Net cash used in investing activities	(22)	(10)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(25)	(56)
Issuance of common stock, net of issuance costs	438
Principal payments on long-term debt	(120)	(7)
Net cash flows provided by (used in) financing activities	293	(63)
NET CHANGE IN CASH	(1,304)	(2,407)
CASH AT BEGINNING OF PERIOD	3,445	11,668
CASH AT END OF PERIOD	2,141	9,261
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	10	9
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Purchases of equipment financed through accounts payable	7	7
Operating lease right-of-use assets obtained in exchange for operating lease obligations	$ 0	$ 0