Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities:
Net Income (Loss)	$ (21,026)	$ (26,124)
Adjustments to reconcile net loss to net cash used in operating activities:
Bad debt expense	61	21
Inventory reserve	4,235	130
Depreciation and amortization	4,933	4,049
Stock-based compensation	2,900	3,115
Deferred taxes	(52)	5
Accrued interest income on short-term investments	(118)	0
Amortization of debt financing costs	291	415
Non-cash lease expense	140	86
Loss on disposal of property, plant, and equipment	49	5
Long-lived assets impairment	0	2,195
Loss on extinguishment of debt	0	824
Changes in operating assets and liabilities:
Accounts receivable	(718)	(721)
Inventories	(315)	649
Income taxes receivable	0	22
Prepaid expenses and other current assets	(943)	(694)
Other non-current assets	334	300
Accounts payable	(430)	(948)
Accrued liabilities	(724)	815
Other	(72)	(66)
Cash used in operating activities	(11,455)	(15,922)
Investing activities:
Purchases of short-term investments	(25,428)	0
Proceeds from sale of property, plant, and equipment	125	0
Purchases of property, plant, and equipment	(558)	(7,622)
Cash used in investing activities	(25,861)	(7,622)
Financing activities:
Proceeds from equity financing, net	15,104	22,915
Repayment of long-term debt	0	(10,000)
Proceeds from financed insurance premiums	385	1,004
Repayment of financed insurance premiums	(572)	(294)
Payment of debt issuance costs	(25)	(24)
Payment of at-the-market facility costs	0	(395)
Proceeds from exercise of stock options	4	76
Proceeds from issuance of common stock under employee stock purchase plan	81	138
Cash provided by financing activities	14,977	13,420
Change in cash, cash equivalents, and restricted cash	(22,339)	(10,124)
Cash, cash equivalents, and restricted cash at beginning of period	28,484	42,236
Cash, cash equivalents, and restricted cash at end of period	6,145	32,112
Supplemental cash flow disclosures:
Income taxes paid	41	0
Interest paid, net of amounts capitalized	1,178	1,934
Debt issuance costs included in accrued liabilities	0	23
Offering costs included in accounts payable and accrued liabilities	18	353
Capitalized property, plant, and equipment included in accounts payable and accrued liabilities	90	205
Issuance of common stock warrants	132	0
Recognition of operating right-of-use lease asset	1,293	(1,137)
Recognition of operating lease liabilities	$ 1,306	$ (1,193)