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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 $ (12,677) $ (13,967)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation, amortization, and impairments 1,811 2,360
Non-cash interest expense 280 346
Write-down of inventories 0 52
Stock-based compensation expense 5,542 6,284
Change in fair value of warrant liabilities (413) (826)
Other 137 56
Changes in operating assets and liabilities:    
Accounts receivable 1,409 857
Inventories 2,085 1,423
Prepaid expenses and other assets (5,979) (570)
Vendor advances (807) 29
Accounts payable (2,643) (1,970)
Deferred revenue (4,010) (470)
Change in operating lease assets and liabilities (222) (201)
Accrued expenses and other liabilities 1,593 (5,080)
Net cash used in operating activities (13,894) (11,677)
Cash flows from investing activities:    
Purchases of property, equipment, and intangible assets, including capitalized software (950) (353)
Net cash used in investing activities (950) (353)
Cash flows from financing activities:    
Proceeds from exercise of stock options 2,309 133
Net proceeds from share offering 0 81,109
Payments to tax authorities for restricted stock units withheld 0 (2,775)
Net cash provided by financing activities 2,309 78,467
Net increase (decrease) in cash, cash equivalents, and restricted cash (12,535) 66,437
Cash, cash equivalents, and restricted cash, beginning of period 154,504 92,790
Cash, cash equivalents, and restricted cash, end of period $ 141,969 $ 159,227