Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (26,864)	$ (32,228)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,661	2,155
Amortization (accretion) of premium (discount) on marketable securities	31	(74)
Stock-based compensation	3,731	4,224
Non-cash operating lease expense	596	802
Other	168	100
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(460)	447
Other noncurrent assets	4	50
Accounts payable	(379)	1,272
Accrued and other current liabilities	(1,903)	(4,350)
Operating lease liabilities	(697)	(1,058)
Net cash used in operating activities	(23,112)	(28,660)
Cash flows from investing activities:
Purchases of property and equipment	(383)	(564)
Purchases of marketable securities		(23,643)
Proceeds from sales of marketable securities	10,958
Proceeds from maturities of marketable securities	11,727	19,717
Other		1
Net cash provided by investing activities	22,302	(4,489)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan		8
Proceeds from exercise of prefunded warrants		1
Net cash provided by financing activities	50,259	46,771
Net change in cash, cash equivalents and restricted cash	49,449	13,622
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	54,191	59,985
Components of cash, cash equivalents and restricted cash:
Cash and cash equivalents	53,772	59,303
Restricted cash included in other noncurrent assets	419	682
Cash, cash equivalents and restricted cash	54,191	59,985
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued and other current liabilities	138	7
Offering costs related to follow-on offering and at-the market-sales included in accounts payable and accrued expenses and other current liabilities	546
Non-cash exercise of stock options		3
Follow-on Offering
Cash flows from financing activities:
Proceeds from issuance of equity, net of issuance costs	49,345	46,762
At-the-market Sales
Cash flows from financing activities:
Proceeds from issuance of equity, net of issuance costs	$ 914	$ 0