Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (69,605)	$ (47,498)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	4,081	3,653
Accretion of marketable securities	(235)
Non-cash interest expense related to note payable	655	44
Stock-based compensation	3,708	3,254
Changes in current assets and liabilities:
Prepaid expenses and other assets	1,034	(235)
Prepaid rent		(2,165)
Right-of-use assets and lease liabilities, net	543	(94)
Accounts payable	589	114
Accrued expense and other liabilities	2,542	(591)
Deferred revenue	19,096	(6,975)
Net cash used in operating activities	(37,592)	(50,493)
Cash flows from investing activities:
Purchases of property and equipment	(2,677)	(2,848)
Purchases of marketable securities	(59,995)
Net cash used in investing activities	(62,672)	(2,848)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of offering costs	42,414
Proceeds from issuance of pre-funded warrants, net of offering costs	92,318
Proceeds from exercise of stock options	692	124
Proceeds from issuance of term loan, net of issuance costs paid to lender		29,354
Payments of debt issuance costs		(230)
Net cash provided by financing activities	135,424	29,248
Net increase (decrease) in cash, cash equivalents and restricted cash	35,160	(24,093)
Cash, cash equivalents, and restricted cash - beginning of period	125,064	166,436
Cash, cash equivalents, and restricted cash - end of period	160,224	142,343
Summary of cash, cash equivalents and restricted cash reported within the consolidated balance sheets:
Cash and cash equivalents	155,193	137,306
Restricted cash	5,031	5,037
Total cash, cash equivalents, and restricted cash	160,224	142,343
Supplemental disclosure of cash flow information:
Cash paid for interest	2,261
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment in accounts payable and accrued liabilities	$ 343	572
Debt issuance costs not yet paid		$ 94