Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net loss	$ (49,198,000)	$ (26,603,000)
Adjustments required to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	679,000	647,000
Share-based compensation expense	745,000	2,288,000
Change in fair value of convertible debt	12,959,000
Non-cash interest expense	1,176,000
Loss on convertible debt extinguishment	3,863,000
Change in right-of-use asset	662,000	1,215,000
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(72,000)	(2,354,000)
Accounts payable and accrued liabilities	(321,000)	584,000
Accrued compensation	(87,000)	770,000
Operating lease liability	(9,723,000)	1,457,000
Net cash used in operating activities	(39,317,000)	(21,996,000)
Investing activities:
Purchases of property and equipment	(5,744,000)	(2,666,000)
Net cash used in investing activities	(5,744,000)	(2,666,000)
Financing activities:
Proceeds from issuance of convertible debt, net of issuance costs	29,101,000
Proceeds from issuance of long-term debt, net of issuance costs	24,925,000
Proceeds from sale of common stock, net of offering costs		44,391,000
Proceeds from exercise of stock options	5,000	125,000
Net cash provided by financing activities	54,031,000	44,516,000
Net increase in cash, cash equivalents and restricted cash	8,970,000	19,854,000
Cash, cash equivalents and restricted cash, beginning of period	20,812,000	11,488,000
Cash, cash equivalents and restricted cash, end of period	29,782,000	31,342,000
Supplemental disclosure of cash flow information:
Property and equipment included in accounts payable	1,047,000	$ 101,000
Right-of-use assets obtained in exchange for operating lease liability	$ 2,513,000