Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (9,197)	$ (15,553)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	51	1,057
Amortization	137	124
Noncash stock-based compensation	979	1,433
Noncash amortization of deferred financing costs	586	797
Unrealized gain on warrants	(3,361)	(8,435)
Changes in operating assets and liabilities:
Accounts receivable	(1,084)	(554)
Inventory	(1,204)	(1,374)
Prepaid expenses and other assets	1,873	1,267
Accounts payable and accrued expenses	1,260	3,643
Lease liability	(154)	(90)
Net cash used in operating activities	(10,114)	(17,685)
Cash flows from investing activities:
Acquisition of property and equipment		(133)
Net cash (used in) provided by investing activities		(133)
Cash flows from financing activities:
Proceeds from issuance of common stock in public offering, net of offering costs	6,509
Repayments of long-term debt	(450)	(5,000)
Repayments of note payable	(61)
Net cash provided by (used in) financing activities	7,653	11,702
Net decrease in cash and cash equivalents	(2,461)	(6,116)
Cash and cash equivalents, beginning of period	5,246	19,143
Cash and cash equivalents, end of period	2,785	13,027
Supplemental disclosure of noncash financing activities
Warrants issued in connection with preferred stock offering		2,101
Supplemental cash flow information
Interest paid	93	898
Series A Convertible Preferred Stock
Supplemental disclosure of noncash financing activities
Conversion of Series preferred stock into common stock		897
Series B Convertible Preferred Stock
Supplemental disclosure of noncash financing activities
Conversion of Series preferred stock into common stock		887
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	$ 1,655	$ 12,573