Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net loss	$ (209,248)	$ (233,659)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	164	500
Amortization of premiums and discounts on investments	(412)	279
Amortization of discount and issuance costs on convertible notes	1,697	1,621
Non-cash interest expense related to the revenue interest liability	46,679	44,590
Stock-based compensation expense	11,958	15,215
Changes in assets and liabilities:
Accounts receivable	(14,765)	(10,795)
Prepaids and other assets	6,192	1,419
Deferred revenue	21,895	(2,810)
Inventories	(30,422)	(807)
Accounts payable	8,678	5,603
Other accrued liabilities	22,097	4,017
Net cash used in operating activities	(135,487)	(174,827)
Investing activities
Purchases of investments	0	(59,897)
Proceeds from sales/maturities of investments	42,500	68,001
Net cash provided by investing activities	42,500	8,104
Financing activities
Proceeds from issuance of common stock and warrants from offering, net of issuance costs	52,428	0
Proceeds from issuance of common stock from ATM Program, net of issuance costs	4,448	90,849
Proceeds from exercise of warrants	9,069	0
Proceeds from exercise of pre-funded warrants	21	0
Payments on revenue interest liability	(15,506)	(8,024)
Repayment of principal on revenue interest liability	0	(50,000)
Payment for other issuance costs	0	(219)
Net cash provided by financing activities	50,460	32,606
Net decrease in cash, cash equivalents and restricted cash	(42,527)	(134,117)
Cash, cash equivalents and restricted cash at beginning of period	124,775	258,892
Cash and cash equivalents at end of period	82,248	124,775
Supplemental disclosure of cash flow information:
Issuance costs not yet paid	635	1
Non-cash right of use asset	$ 115	$ 5