CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash flows from operating activities
Net loss	$ (74,497)	$ (66,664)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	271	284
Amortization of debt issuance costs	1,246	1,102
Accretion of revenue interest financing debt, net of cash paid	2,106	2,916
Amortization of discount on short-term investments	(149)	(669)
Stock-based compensation expense	10,110	7,632
Amortization of net contract asset/liability	(741)	(837)
Noncash lease expense	443	102
Noncash lease liability	87	196
Write off of fixed assets		62
Write off of right-of-use assets	757		$ 0
Financing costs included in interest expense	300
Changes in operating assets and liabilities:
Net contract asset/liability	1,040	1,569
Prepaid expenses and other current assets, non-current assets, inventory and accounts receivable	(3,160)	(7,441)
Accounts payable and accrued expenses	(6,115)	(4,088)
Net cash used in operating activities	(68,302)	(65,836)
Cash flows from investing activities
Maturities of short-term investments	29,885	5,000
Purchases of short-term investments		(51,995)
Purchases of property and equipment	(38)
Net cash provided by (used in) investing activities	29,847	(46,991)
Cash flows from financing activities
Proceeds from exercise of stock options	257	484
Prepayments of long-term debt, including financing costs	(17,698)
Other cash flows from financing activities		(421)
Net cash (used in) provided by financing activities	(17,441)	63
Net decrease in cash and cash equivalents	(55,896)	(112,764)
Cash and cash equivalents-beginning of period	120,572	240,551	240,551
Cash and cash equivalents-end of period	64,676	127,787	$ 120,572
Supplemental disclosure of cash flow information
Unrealized gain (loss) on short-term investments	20	(114)
Property and equipment in accounts payable	60
Cash paid for interest during the period	$ 5,611	4,336
Cash paid for income taxes during the period		$ 163