CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (4,584)	$ (1,451)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	302	268
Amortization of operating lease right-of-use asset	46	53
Amortization of finance lease right-of-use asset	34	11
Amortization of deferred financing costs, debt discounts and debt premiums	1	2
Gain on forgiveness of debt		(794)
Gain on settlement of liability	(1)	(17)
Stock-based compensation	2,232	437
Value of stock issued in payment of services		150
Provision for losses on doubtful accounts	78	288
Warrant revaluation	(222)	118
Derecognition of finance lease right-of-use asset		29
Changes in operating assets and liabilities:
Accounts receivable	(535)	(39)
Inventories	42	(122)
Other assets	111	(177)
Accounts payable	448	194
Operating lease liabilities	(45)	(54)
Accrued expenses and other liabilities	(241)	(156)
Net cash used in operating activities	(2,334)	(1,260)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(10)	(185)
Net cash used in investing activities	(10)	(185)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(56)	(12)
Deposits on finance lease right-of-use assets		(29)
Issuance of common stock, net of issuance costs		1,260
Principal payments on long-term debt	(7)	(14)
Payments on common stock warrant liabilities		(130)
Net cash flows (used in) provided by financing activities	(63)	1,075
NET CHANGE IN CASH	(2,407)	(370)
CASH AT BEGINNING OF PERIOD	11,668	2,656
CASH AT END OF PERIOD	9,261	2,286
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	9	5
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Purchases of equipment financed through accounts payable	$ 7	82
Finance lease right-of-use assets obtained in exchange for finance lease obligations		$ 96