CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (5,853)	$ (12,178)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	1,225	1,219
Amortization of operating lease right-of-use asset	209	187
Amortization of finance lease right-of-use asset	83	114
Amortization of deferred financing costs, debt discounts and debt premiums	3	4
Gain on settlement of liability		(25)
Gain on dissolution of joint venture	(65)
Gain on write-off of liabilities	(1,720)
Stock-based compensation	1,558	3,801
Value of stock issued in payment of services	177
Provision for losses on doubtful accounts	218	406
Warrant revaluation		(606)
Changes in operating assets and liabilities:
Accounts receivable	(483)	(745)
Inventories	324	(144)
Other assets	451	491
Accounts payable	(169)	165
Operating lease liabilities	(206)	(182)
Deferred revenue	(9)	101
Accrued expenses	698	(329)
Net cash used in operating activities	(3,559)	(7,721)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(126)	(277)
Net cash used in investing activities	(126)	(277)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(80)	(151)
Issuance of common stock, net of issuance costs	2,245	129
Proceeds from exercise of warrants		11
Principal payments on long-term debt	(423)	(214)
Net cash flows provided by (used in) financing activities	1,742	(225)
NET CHANGE IN CASH	(1,943)	(8,223)
CASH AT BEGINNING OF PERIOD	3,445	11,668
CASH AT END OF PERIOD	1,502	3,445
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	42	45
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Purchases of equipment financed through accounts payable	11	34
Prepaid insurance financed with loan	372	413
Operating lease right-of-use assets obtained in exchange for operating lease obligations	$ 58	92
Finance lease right-of-use assets obtained in exchange for finance lease obligations		$ 12