CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net loss	$ (30,696)	$ (26,665)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	3,345	3,353
Non-cash interest expense on liability related to sales of future royalties and milestones, net of issuance costs accretion	1,982
Depreciation and amortization	42	58
Noncash lease expense	269	375
Accretion of available-for-sale marketable securities, net	(510)	(94)
Changes in operating assets and liabilities:
Accounts receivable, net - related party	1,047	(2,806)
Inventory, net	80	(1,132)
Other receivables	49	1
Prepaid expenses	2,364	(928)
Accounts payable and accrued expenses	(10,151)	(6,318)
Operating lease liability		(462)
Reimbursement of lease incentive	1,726
Net cash used in operating activities	(30,453)	(34,618)
Investing activities
Proceeds from maturities of available-for-sale marketable securities	59,000	29,500
Proceeds from redemptions of available-for-sale marketable securities, at par		4,000
Purchases of available-for-sale marketable securities	(32,213)	(15,792)
Purchases of property and equipment	(836)
Net cash provided by investing activities	25,951	17,708
Financing activities
Payments to royalty purchase and sale agreement	(685)
Proceeds from the exercise of stock options		560
Net cash (used in) provided by financing activities	(685)	560
Net decrease in cash, cash equivalents and restricted cash	(5,187)	(16,350)
Cash, cash equivalents and restricted cash at beginning of period	53,683	64,149
Cash, cash equivalents and restricted cash at end of period	48,496	$ 47,799
Noncash investing and financing activities
Accrual for leasehold improvements	$ 211