Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (5,517)	$ (4,644)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	83	72
Amortization of debt issuance costs and debt discount	16	21
Stock-based compensation	1,096	245
Noncash interest expense and other charges	442	486
Change in right of use asset	4	14
Provision for excess and obsolete inventories	34	179
Other	15	(50)
Changes in operating assets and liabilities:
Accounts receivable	(378)	94
Inventories	584	(469)
Prepaid expenses and other current assets	(433)	(616)
Other assets	(210)	2
Accounts payable	(30)	(114)
Accrued compensation	212	367
Accrued expenses and other current liabilities	5	68
Other long-term liabilities	(657)	133
Net cash used in operating activities	(4,734)	(4,212)
Cash flows from investing activities
Investing activities	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities
Net share settlement on restricted stock awards in satisfaction of tax obligations	374	(0)
Net cash (used in) provided by financing activities	6,633	(21)
Net change in cash and cash equivalents	1,899	(4,233)
Cash and cash equivalents, beginning of period	5,275	14,603
Cash and cash equivalents, end of period	7,174	10,370
Supplemental disclosure of cash flow information
Increase to right of use asset and leasehold liability arising from lease amendment	1,177	0
Accretion of preferred stock dividends	65	1,218
Reclassification of other long-term liabilities to accrued compensation	0	638
Transfers between inventory and property and equipment	118	(62)
Common Stock [Member]
Cash flows from financing activities
Proceeds from the issuance of common stock and convertible preferred stock, net of commissions and issuance costs	7,007	0
Preferred Stock [Member]
Cash flows from financing activities
Proceeds from the issuance of common stock and convertible preferred stock, net of commissions and issuance costs	$ 0	$ (21)