v3.26.1
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 $ (4,204) $ (28,200)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 985 3,495
Non-cash lease expense 71 71
Foreign exchange remeasurement loss (gain) 129 (223)
Impairment of property, plant and equipment 0 16,569
Depreciation 12 498
Amortization (accretion) on invested securities 178 (236)
Non-cash interest expense 193 212
Loss on disposals of property and equipment 2 0
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 1,526 6,482
Other long-term assets 80 80
Accrued rent receivable (304) (1,392)
Accounts payable 17 (376)
Operating lease liabilities (76) (163)
Accrued expenses and other current liabilities 54 (1,012)
Net cash used in operating activities (1,337) (4,195)
Cash flows from investing activities:    
Purchase of marketable securities (22,317) (38,194)
Maturities of marketable securities 22,000 47,400
Cash received from held for sale assets 0 405
Net cash (used in) provided by investing activities (317) 9,611
Cash flows from financing activities:    
Proceeds from exercise of stock options 0 404
Loan agreement closing costs 0 (172)
Net cash provided by financing activities 0 232
Net (decrease) increase in cash, cash equivalents and restricted cash (1,654) 5,648
Effect of exchange rate changes on cash, cash equivalents and restricted cash (5) 43
Cash, cash equivalents and restricted cash—beginning of period 6,804 10,635
Cash, cash equivalents and restricted cash—end of period 5,145 16,326
Supplemental disclosure of cash flow information:    
Cash paid for interest $ 1,359 $ 886