CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Operating activities
Net loss	$ (141,372)	$ (52,179)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	7,767	6,376
Depreciation and amortization	405	457
Non-cash interest expense and amortization of debt issuance costs	4,009	3,061
Non-cash accretion & amortization of short-term investments	(2,055)	(2,341)	$ 2,341
Unrealized loss on short-term investments	(244)
Non-cash accretion of non-current liability	929
Non-cash rent expense	111	94
Change in fair value of embedded derivative liability	(490)	(50)
Acquired IPR&D assets classified as investing activities	92,385	5,395
Changes in operating assets and liabilities:
Accounts receivable	172	(1,893)
Inventory	117	(2,570)
Prepaid expenses and other current assets	(2,421)	2,155
Deferred revenue		(6)
Other long-term assets, net	1,195	(99)
Accounts payable, accrued expenses and other liabilities	(1,251)	5,167
Net cash used in operating activities	(40,743)	(36,433)
Investing activities
Purchases of short-term investments		(69,644)
Maturities of short-term investments	70,050	92,675
Acquisition of IPR&D assets	(40,000)	(4,520)
Purchases of property and equipment		(47)
Net cash provided by investing activities	30,050	18,464
Financing activities
Repayment of deferred royalty obligation	(2,783)	(1,351)
Proceeds from the exercise of stock options	6,353	553
Proceeds from issuance of common stock from ESPP	673	665
Net cash provided by (used in) financing activities	4,243	(133)
Effect of exchange rates on cash	(71)	86
Net (decrease) increase in cash, cash equivalents and restricted cash	(6,521)	(18,016)
Cash, cash equivalents and restricted cash at beginning of period	60,409	128,005	128,005
Cash, cash equivalents and restricted cash at end of period	53,888	$ 109,989	$ 60,409
Supplemental disclosure of non-cash investing activities
Non-current liability issued in exchange for the acquisition of IPR&D	$ 33,669
Issuance of common stock in exchange for IPR&D	18,716