Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net loss	$ (50,147)	$ (61,659)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,745	4,278
Amortization (accretion) of premium (discount) on marketable securities	300	68
Stock-based compensation	7,367	8,835
Non-cash operating lease expense	1,208	1,625
Other	230	154
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	1,488	1,138
Other noncurrent assets	508	351
Accounts payable	(1,514)	(1,160)
Accrued and other current liabilities	(1,512)	(3,754)
Operating lease liabilities	(1,398)	(2,153)
Net cash used in operating activities	(38,725)	(52,277)
Cash flows from investing activities:
Purchases of property and equipment	(525)	(637)
Purchases of marketable securities		(34,451)
Proceeds from sales of marketable securities	10,958
Proceeds from maturities of marketable securities	36,857	52,209
Other	0	5
Net cash provided by investing activities	47,290	17,126
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	70	578
Proceeds from exercise of prefunded warrants		1
Net cash provided by financing activities	49,783	47,341
Net change in cash, cash equivalents and restricted cash	58,348	12,190
Cash and cash equivalents and restricted cash at beginning of period	4,742	46,363
Cash and cash equivalents and restricted cash at end of period	63,090	58,553
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	62,671	58,134
Restricted cash included in other noncurrent assets	419	419
Cash, cash equivalents and restricted cash	63,090	58,553
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued and other current liabilities	7	98
Follow-on Offering
Cash flows from financing activities:
Proceeds from issuance of equity, net of issuance costs	48,801	46,762
At-the-market Sales
Cash flows from financing activities:
Proceeds from issuance of equity, net of issuance costs	$ 912	$ 0