CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (3,416)	$ (4,030)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	73	69
Stock-based compensation	173	336
Bad debt expense	2	(2)
Changes in operating assets and liabilities:
Accounts receivable	(150)	71
Prepaid expenses and other current assets	(76)	92
Inventory	(104)	88
Other assets	(3)	(2)
Accounts payable	41	(420)
Accrued expenses	47	61
Deferred revenue	(3)	(20)
Net cash used in operating activities	(3,416)	(3,757)
Cash flows from investing activities:
Purchase of property and equipment	(41)	(21)
Net cash used in investing activities	(41)	(21)
Cash flows from financing activities:
Proceeds from issuances of common stock, net	0	1,210
Proceeds from issuance of notes payable	25	0
Repayments of notes payable	(17)	0
Proceeds from the exercise of warrants	6	0
Payment of employee withholding taxes related to share based awards	0	(11)
Net cash provided by financing activities	14	1,199
Decrease in cash and cash equivalents	(3,443)	(2,579)
Cash and cash equivalents, beginning of period	5,395	4,775
Cash and cash equivalents, end of period	1,952	2,196
Supplemental cash flow information is as follows:
Interest paid	9	0
Income taxes paid	0	0
Non-cash investing and financing activities:
Note payable incurred for the purchase of certain equipment	$ 4	$ 0