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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities:    
Net loss $ (13,597) $ (35,944)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 943 917
Provision to write down inventories to net realizable value 864 3,879
Change in fair value of preferred stock warrant and contingent shares liability   (152)
Non-cash interest expense 6,706 6,705
Stock-based compensation 5,782 5,994
Change in allowance for credit losses (110) (1,616)
Non-cash lease expense 707 820
Accretion of interest on marketable securities (420) (260)
Loss on disposal of property and equipment 12  
Changes in operating assets and liabilities:    
Accounts receivable (7,696) (350)
Inventory (7,403) 10,733
Prepaid expenses and other assets 289 1,598
Accounts payable 19,993 (3,387)
Accrued expenses and other liabilities (460) (2,011)
Deferred revenue 728 429
Warranty liability 2,536 75
Operating lease liabilities (451) (837)
Other long-term liabilities 251  
Net cash provided by (used in) operating activities 8,674 (13,407)
Cash flows from investing activities:    
Purchase of marketable securities (28,862) (6,756)
Purchase of property and equipment (197) (757)
Sales and maturities of marketable securities 21,625 25,818
Net cash (used in) provided by investing activities (7,434) 18,305
Cash flows from financing activities:    
Proceeds from exercise of stock options 121 272
Proceeds from at-the-market offering 11,365  
Payment of tax withholdings on restricted stock awards and options (4) (114)
Net cash provided by financing activities 11,482 158
Net increase in cash and cash equivalents 12,722 5,056
Cash and cash equivalents at beginning of period 11,746 4,405
Cash and cash equivalents at end of period 24,468 9,461
Supplemental disclosure of cash flow information:    
Cash paid for interest 2,518 2,500
Cash paid for income taxes 169 547
Supplemental schedule of non-cash investing and financing activities:    
Operating lease right of use assets obtained in exchange for operating lease liabilities 1,668 159
Property and equipment in accounts payable 287 39
Non-cash consideration paid for fSight acquisition   375
Unrealized gain resulting from change in fair value of marketable securities $ 3 $ 62