UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities
Net loss	$ (11,737)	$ (17,254)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,109	1,142
Amortization and accretion of investments, net	(247)	(575)
Noncash lease expense	505	525
Gain on disposal of assets, including assets held for sale	(414)	(279)
Share-based compensation	1,452	1,295
Carrying value adjustment to assets held for sale	0	1,590
Changes in operating assets and liabilities:
Accounts receivable	(2,537)	(5)
Inventory	(1,919)	0
Prepaid expenses and other assets	856	1,626
Accounts payable	(389)	(54)
Accrued expenses and other liabilities	251	(1,430)
Operating lease liabilities	(656)	(585)
Net cash used in operating activities	(12,726)	(14,004)
Cash flows from investing activities
Purchase of property and equipment	(1,874)	(7,334)
Proceeds from sale of property and equipment	1,598	219
Receipt of security deposit	0	41
Purchase of investments	(15,174)	0
Proceeds from sale and maturity of investments	25,500	24,627
Net cash provided by investing activities	10,050	17,553
Cash flows from financing activities
Taxes paid related to net share settlement of equity awards	0	(444)
Net cash used in financing activities	0	(444)
Net (decrease) increase in cash and cash equivalents and restricted cash	(2,676)	3,105
Cash and cash equivalents and restricted cash, beginning of period	23,603	9,892
Cash and cash equivalents and restricted cash, end of period	20,927	12,997
Supplemental disclosure of noncash investing and financing activities:
Acquisitions of property and equipment included in accounts payable and accrued expenses and other current liabilities	$ 130	$ 244