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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities    
Net loss $ (63,140) $ (43,202)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and ROU amortization expense 709 641
Non-cash interest expense (debt discount and deferred costs) 2,828 6,581
Net amortization of premiums and accretion of discounts on marketable securities (960) (2,253)
Gain on change in fair value of derivatives (102) (6,505)
Exchange related gain, net   (14,207)
Stock-based compensation expense 7,160 6,735
Provision for inventory obsolescence and losses 4,203 89
Loss on disposal of assets   5
Other 488 56
Changes in assets and liabilities:    
Accounts receivable 425 (998)
Prepaid expenses and other current assets 1,056 (129)
Inventory 1,909 (2,509)
Deposits and other assets 1,542 (342)
Accounts payable (2,947) 669
Accrued expenses and other liabilities 1,483 1,161
Accrued interest (192) (292)
Operating lease liabilities (681) (596)
Net cash used in operating activities (46,219) (55,096)
Cash flows from investing activities    
Capital expenditures (2,205) (180)
Purchase of marketable securities (58,018) (68,537)
Proceeds from sale and maturity of marketable securities 45,395 122,235
Net cash (used in) provided by investing activities (14,828) 53,518
Cash flows from financing activities    
Proceeds from issuance of common stock, net 3,667 7,376
Proceeds from exercise of stock options and ESPP issuances, net 183 71
Proceeds from issuance of term loan, net 9,950 24,446
Taxes paid related to net share settlement of equity awards (1,041) (1,603)
Payment of debt issuance costs   (244)
Proceeds from issuance of warrants, net   14,698
Net cash provided by financing activities 12,759 21,544
Net (decrease) increase in cash, cash equivalents (48,288) 19,966
Cash, cash equivalents, and restricted cash at beginning of period 75,709 35,793
Cash, cash equivalents, and restricted cash at ending of period 27,421 55,759
Supplemental disclosure of cash flow information    
Cash paid during the period for interest 3,630 3,100
Lease liabilities arising from obtaining right-of-use assets   3,831
Supplemental disclosure of non-cash investing and financing activities    
Property and equipment purchases included in accounts payable and accrued expenses 466  
Issuance of warrants in exchange for PHC Notes   48,564
Issuance of warrants for Loan and Security Agreement $ 149 364
Issuance of common stock converted from 2025 Notes   21,002
2023 Notes    
Cash flows from financing activities    
Repayment of Notes   (15,700)
2025 Notes    
Cash flows from financing activities    
Repayment of Notes   $ (7,500)