Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (48,397)	$ (31,934)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	144	112
Stock-based compensation	4,302	3,415
Amortization of debt-related costs	517	265
Other non-cash adjustments	(226)	0
Changes in operating assets and liabilities:
Increase in accounts receivable	(516)	(234)
Increase in inventories	(133)	0
Increase in prepaid expenses and other current assets	(1,879)	(867)
Decrease in other long-term assets	166	400
Decrease in accounts payable and other liabilities	(9,108)	(2,770)
Net cash used in operating activities	(55,130)	(31,613)
Cash flows from investing activities:
Purchases of property and equipment	0	(248)
Purchases of investments	(183,224)	(28,864)
Maturities of investments	73,000	41,205
Net cash (used in) provided by investing activities	(110,224)	12,093
Cash flows from financing activities:
Proceeds from issuance of common stock for equity incentive plans	88	0
Proceeds from issuance of preferred stock, net of fees	241,425	0
Repurchase of common stock for equity incentive plans	(1,730)	(824)
Other	(400)	0
Net cash provided by (used in) financing activities	239,383	(824)
Net increase (decrease) in cash and cash equivalents	74,029	(20,344)
Cash and cash equivalents at beginning of period	22,465	46,345
Cash and cash equivalents at end of period	96,494	26,001
Supplemental disclosure of cash flow information:
Cash paid for interest	3,257	1,556
Supplemental disclosure of non-cash investing and financing activities:
Accrued financing costs	$ 150	$ 0