Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net loss	$ (43,574)	$ (110,470)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	826	643
Net amortization of premiums and discounts on marketable securities	(2,402)	(3,191)
Stock-based compensation	9,085	13,050
Non-cash operating lease expense	1,512	1,344
Other non-cash items	153	319
Changes in operating assets and liabilities:
Accounts receivable	(1,570)	30,000
Prepaid expenses and other current assets	321	(1,992)
Other assets	(500)	0
Accounts payable	(4,174)	3,337
Accrued expenses	(4,116)	(9,502)
Operating lease liabilities	(1,476)	(1,421)
Deferred revenue	(8,597)	(12,956)
Net cash used in operating activities	(54,512)	(90,839)
Cash flows from investing activities
Maturities of marketable securities	40,000	119,000
Purchase of marketable securities	(106,901)	(121,733)
Purchase of property and equipment	(132)	(1,310)
Net cash used in investing activities	(67,033)	(4,043)
Cash flows from financing activities
Net proceeds from at-the-market facilities	5,780	93,620
Proceeds from exercise of stock options	56	427
Proceeds from purchases of common stock under ESPP	258	963
Payment of debt issuance costs	0	(150)
Payments under finance lease obligations	(112)	(131)
Net cash provided by financing activities	5,982	94,729
Decrease in cash, cash equivalents and restricted cash	(115,563)	(153)
Cash, cash equivalents and restricted cash, beginning of period	175,039	129,363
Cash, cash equivalents and restricted cash, end of period	59,476	129,210
Supplemental cash flow information:
Purchases of property and equipment in accounts payable and accrued expenses	0	367
Common stock issuance costs in accounts payable and accrued expenses	0	81
Cash paid for interest	$ 1,751	$ 1,637