Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows used in operating activities:
Net loss	$ (46,077)	$ (70,702)
Adjustments to reconcile net loss to cash used in operating activities:
Stock-based compensation expense	12,596	12,676
Depreciation and amortization expense	896	1,003
Reduction in carrying amount of right-of-use asset	3,176	3,048
Net accretion of discounts on marketable securities	(2,930)	(1,724)
Amortization of debt discount − related party	0	354
Other	22	68
Changes in operating assets and liabilities:
Accounts receivable	10,632	445
Prepaid expenses and other current and long-term assets	(5,116)	2,096
Accounts payable	(533)	941
Accrued expenses and other current liabilities	(9,414)	(3,133)
Operating lease liability	(2,560)	(2,299)
Deferred revenue	16,216	5,105
Net cash used in operating activities	(23,092)	(52,122)
Cash flows (used in) provided by investing activities:
Proceeds from maturities of marketable securities	110,067	129,708
Purchases of marketable securities	(174,972)	(60,078)
Purchases of property and equipment, net	(197)	(951)
Net cash (used in) provided by investing activities	(65,102)	68,679
Cash flows provided by (used in) financing activities:
Proceeds from exercise of stock options	654	58
Payments for repurchase of common stock for tax withholding	(109)	(94)
Payment of long-term debt − related party	0	(1,500)
Other	84	106
Net cash provided by (used in) financing activities	34,718	(1,430)
Net change in cash, cash equivalents and restricted cash	(53,476)	15,127
Cash, cash equivalents and restricted cash at beginning of period	130,033	33,033
Cash, cash equivalents and restricted cash at end of period	76,557	48,160
Reconciliation of cash, cash equivalents and restricted cash:
Cash, cash equivalents and restricted cash at end of period	76,557	48,160
Less: restricted cash	(3,443)	(3,279)
Cash and cash equivalents at end of the period	73,114	44,881
Supplemental disclosures of cash flow information:
Cash paid for leases	4,399	4,271
Cash paid for interest − related party	0	852
Supplemental disclosures of non-cash investing activities:
Capital expenditures in accounts payable and accrued expenses	13	223
Stock Purchase Agreement
Cash flows provided by (used in) financing activities:
Proceeds from issuance of common stock	20,000	0
At-The-Market
Cash flows provided by (used in) financing activities:
Proceeds from issuance of common stock	$ 14,089	$ 0