Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (127,363)	$ (71,450)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	407	324
Stock-based compensation	11,128	8,252
Amortization of debt-related costs	1,156	396
Other non-cash adjustments	(3,613)	0
Changes in operating assets and liabilities:
Increase in accounts receivable	(290)	(26)
Increase in inventories	(336)	0
Increase in prepaid expenses and other current assets	(1,935)	(470)
Decrease in other long-term assets	389	329
Increase (decrease) in accounts payable and other liabilities	9,108	(4,637)
Net cash used in operating activities	(111,349)	(67,282)
Cash flows from investing activities:
Purchases of property and equipment	(470)	(80)
Purchases of investments	(223,241)	(133,363)
Maturities of investments	121,870	38,191
Net cash used in investing activities	(101,841)	(95,252)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of fees	138,823	94,268
Repurchase of common stock	(824)	(864)
Proceeds from debt borrowings, net of fees	49,962	23,899
Net cash provided by financing activities	187,961	117,303
Net decrease in cash and cash equivalents	(25,229)	(45,231)
Cash and cash equivalents at beginning of period	46,345	64,065
Cash and cash equivalents at end of period	21,116	18,834
Supplemental disclosure of cash flow information:
Cash paid for interest	6,767	1,281
Supplemental disclosure of non-cash investing and financing activities:
Right-of-use asset obtained in exchange for operating lease liability	0	5,206
Issuance of equity-classified warrants	307	698
Issuance of treasury stock	$ 0	$ (6,321)