CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (16,941)	$ (28,160)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	243	198
Stock-based compensation expense	2,089	6,806
Revaluation of contingent consideration	2,800	(800)
Changes in operating assets and liabilities:
Accounts receivable	(75)	(202)
Prepaid expenses and other assets	2,044	(874)
Accounts payable	1,932	(2,161)
Accrued expenses	(12,907)	(1,160)
Net cash used in operating activities	(20,815)	(26,353)
Cash flows from investing activities:
Purchases of property and equipment	(135)	(553)
Purchases of marketable securities		(28,524)
Proceeds from sales and maturities of marketable securities	16,968	54,875
Net cash provided by investing activities	16,833	25,798
Cash flows from financing activities:
Payments of employee withholding taxes related to restricted stock unit award vesting	(55)
Net cash used in financing activities	(55)
Net decrease in cash and cash equivalents	(4,037)	(555)
Cash and cash equivalents at beginning of period	39,878	45,277
Cash and cash equivalents at end of period	$ 35,841	44,722
Supplemental disclosure of non-cash investing and financing activities:
Additions to property and equipment included in accounts payable		$ 41