UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Cash flows from operating activities
Net loss	$ (25,665)	$ (30,668)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,225	2,428
Amortization and accretion of investments, net	(419)	(992)
Noncash lease expense	1,024	992
Gain on disposal of assets, including assets held for sale	(472)	(585)
Share-based compensation	3,194	2,681
Carrying value adjustment to assets held for sale	0	1,590
Changes in operating assets and liabilities:
Accounts receivable	(2,184)	764
Inventory	(1,162)	0
Prepaid expenses and other assets	1,338	1,920
Accounts payable	153	1,015
Accrued expenses and other liabilities	1,478	(1,962)
Operating lease liabilities	(1,326)	(1,182)
Net cash used in operating activities	(19,816)	(23,999)
Cash flows from investing activities
Purchase of property and equipment	(2,086)	(11,575)
Proceeds from sale of property and equipment	1,853	800
Receipt of security deposit	0	41
Purchase of investments	(34,727)	(18,397)
Proceeds from sale and maturity of investments	45,003	60,026
Net cash provided by investing activities	10,043	30,895
Cash flows from financing activities
Proceeds from exercise of common stock options	1	0
Taxes paid related to net share settlement of equity awards	0	(532)
Net cash provided by (used in) financing activities	1	(532)
Net (decrease) increase in cash and cash equivalents and restricted cash	(9,772)	6,364
Cash and cash equivalents and restricted cash, beginning of period	23,603	9,892
Cash and cash equivalents and restricted cash, end of period	13,831	16,256
Supplemental disclosure of noncash investing and financing activities:
Acquisitions of property and equipment included in accounts payable and accrued expenses and other current liabilities	$ 56	$ 447