Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (29,876)	$ (31,334)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	311	473
Net accretion of discounts on marketable securities	(817)	(1,132)
Stock-based compensation	3,280	3,879
Non-cash operating lease expense	907	681
Loss on disposal of property and equipment	99	5
Impairment of assets held for sale	742
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(539)	339
Deposits and other assets	2,796	(489)
Accounts payable	(658)	(321)
Accrued expenses and other current liabilities	(5,488)	(2,011)
Operating lease liabilities	(1,646)	(701)
Deferred revenue		(7,316)
Other long-term liabilities	83
Net cash used in operating activities	(30,806)	(37,927)
Cash flows from investing activities:
Purchases of property and equipment		(152)
Proceeds from sale of property and equipment	245	4
Purchases of marketable securities	(72,265)	(47,050)
Proceeds from maturities of marketable securities	27,200	59,072
Net cash provided by (used in) investing activities	(44,820)	11,874
Cash flows from financing activities:
Proceeds from issuance of common stock for underwritten registered offering, net of offering costs		37,544
Repurchase of common stock		(663)
Proceeds from exercise of stock options		121
Net cash provided by financing activities		37,002
Net increase (decrease) in cash, cash equivalents and restricted cash	(75,626)	10,949
Cash, cash equivalents and restricted cash, beginning of period	121,172	60,791
Cash, cash equivalents and restricted cash, end of period	45,546	71,740
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets:
Cash and cash equivalents	44,268	70,868
Restricted cash included in other assets	1,278	872
Cash, cash equivalents and restricted cash, end of period	$ 45,546	$ 71,740