Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net loss	$ (6,001)	$ (7,842)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock based compensation	213	286
Depreciation	6	7
Amortization of right-of-use asset	129	122
Changes is operating assets and liabilities:
Accounts receivable	(43)	(3)
Inventory	(65)	(332)
Prepaid expenses and other current assets	8	462
Deferred offering costs		(79)
Accounts payable	(685)	813
Accrued expenses	(184)	(6)
Lease liabilities	(115)	(135)
Other assets		15
Net cash used in operating activities	(6,737)	(6,692)
Cash flows from investing activities
Acquisition of property and equipment	(118)	(11)
Net cash used in investing activities	(118)	(11)
Cash flows from financing activities
Gross proceeds	8,507
Proceeds from exercise of stock options		56
Net cash provided by financing activities	8,507	56
Net increase (decrease) in cash and cash equivalents	1,652	(6,647)
Cash and cash equivalents
Beginning of period	3,517	12,975
End of period	5,169	$ 6,328
Supplemental disclosure on noncash financing activities
Issuance of common stock warrant	363
Deferred offering costs charged to additional paid-in-capital	$ 584