Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (5,390)	$ (10,385)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	26	527
Amortization	67	61
Noncash stock-based compensation	498	764
Noncash amortization of deferred financing costs	307	419
Unrealized gain on warrants	(1,687)	(1,384)
Changes in operating assets and liabilities:
Accounts receivable	254	(132)
Income taxes receivable		(4,675)
Inventory	(879)	(1,727)
Prepaid expenses and other assets	260	707
Accounts payable and accrued expenses	5,026	1,095
Lease liability	(77)	(21)
Net cash used in operating activities	(1,595)	(14,751)
Cash flows from investing activities:
Acquisition of property and equipment		(126)
Net cash (used in) provided by investing activities		(126)
Cash flows from financing activities:
Repayments of long-term debt	(225)	(5,000)
Net cash provided by (used in) financing activities	778	(523)
Net decrease in cash and cash equivalents	(817)	(15,400)
Cash and cash equivalents, beginning of period	5,246	19,143
Cash and cash equivalents, end of period	4,429	3,743
Supplemental cash flow information
Interest paid	94	452
Public offering
Cash flows from financing activities:
Proceeds from issuance of preferred stock in registered direct offering, net of offering costs		4,129
At-the-market sales
Cash flows from financing activities:
Proceeds from At-the-Market sales of common stock, net of offering costs	$ 1,003	$ 348