Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (7,547)	$ (5,774)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	148	229
Stock-based compensation	570	550
Bad debt expense	5
Paycheck Protection Program loan forgiveness		(646)
Paycheck Protection Program loan accrued interest forgiveness		(4)
Gain on sale of equipment		(1)
(Increase) decrease in current assets:
Accounts receivable – trade	(14)	(54)
Accounts receivable – other	(2)
Other assets		11
Prepaid expenses	(174)	(403)
Inventory	48	(62)
Increase (decrease) in current liabilities:
Accounts payable	142	(137)
Accrued expenses	409	258
Deferred revenue	48
Net cash used in operating activities	(6,367)	(6,033)
CASH FLOWS FROM INVESTING ACTIVITIES
Cash received on sale of property and equipment		1
Purchase of property and equipment	(135)	(84)
Net cash used in investing activities	(135)	(83)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of common stock, net		12,421
Repayments of notes payable	(5)	(36)
Repayments of finance lease obligations	(27)	(40)
Proceeds from the exercise of warrants		1,228
Payment of employee withholding taxes related to share based awards		(17)
Net cash (used in) provided by financing activities	(32)	13,556
NET CHANGE IN CASH	(6,534)	7,440
CASH AT BEGINNING OF PERIOD	9,326	3,643
CASH AT END OF PERIOD	2,792	11,083
SUPPLEMENTAL INFORMATION:
Interest paid	1	8
Income taxes paid