CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 13,166	$ 22,938
Accounts receivable, net	2,673	489
Inventory	1,162	0
Prepaid expenses and other current assets	3,621	4,597
Short-term investments	51,011	69,427
Assets held for sale	0	1,181
Total current assets	71,633	98,632
Property and equipment, net	36,317	40,461
Operating lease right-of-use assets	2,444	3,468
Other assets	987	1,004
Long-term investments	68,208	59,994
Total assets	179,589	203,559
Current liabilities
Accounts payable	1,490	3,142
Current portion of operating lease liabilities	2,469	2,726
Accrued expenses and other current liabilities	5,473	3,995
Total current liabilities	9,432	9,863
Operating lease liabilities, net of current portion	577	1,646
Other liabilities	41	41
Total liabilities	10,050	11,550
Commitments and contingencies (Note 10)
Stockholders’ equity
Common stock, $0.0001 par value; 250,000,000 shares authorized; 189,207,288 and 187,878,790 shares issued at June 30, 2026 and December 31, 2025, respectively; $178,597,218 and $177,268,720 shares outstanding as of June 30, 2026 and December 31, 2025, respectively	19	19
Additional paid-in capital	416,317	413,122
Treasury stock, at cost	(14,132)	(14,132)
Accumulated deficit	(232,665)	(207,000)
Total stockholders’ equity	169,539	192,009
Total liabilities and stockholders’ equity	$ 179,589	$ 203,559