CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (37,972)	$ (53,126)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	465	193
Employee stock-based compensation	16,306	34,370
Non-employee stock-based compensation	106	627
Non-cash warrant expense	984
Paycheck Protection Loan Program		(397)
Net change in operating lease assets and liabilities	(22)	(16)
Loss on write-off of inventory	896
(Gain)/loss on the sale or disposal of property and equipment	(30)	152
Gain on fair value of convertible debt and warrant liability	(4,007)
Changes in assets and liabilities:
Prepaid expenses and other current assets	243	42
Inventory	(797)
Other assets	(558)	(205)
Accounts payable and accrued liabilities	500	1,798
Other current liabilities	(117)	721
Other long-term liabilities	300
Net cash used in operating activities	(23,703)	(15,841)
Cash flows from investing activities:
Purchases of property and equipment	(1,571)	(1,394)
Proceeds from the sale of property and equipment	559	230
Payments on financing lease liability	(77)
Net cash used in investing activities	(1,089)	(1,164)
Cash flows from financing activities:
Proceeds from public offering, net of equity offering costs	18,595	15,273
Proceeds from the issuance of convertible debt	7,330
Payments on convertible debt	(2,353)
Proceeds from the exercise of stock options	547
Net cash provided by financing activities	24,119	15,273
Net decrease in cash	(673)	(1,732)
Cash, beginning of period	2,701	3,146
Cash, end of period	2,028	1,414
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1	5
Interest	1
Supplemental disclosure of non-cash investing and financing activities:
Debt converted to equity	16,464
Capital expenditures included in accounts payable and other accrued liabilities	196	193
Stock-based compensation expense capitalized to property and equipment	$ 172