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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Cash flows from operating activities    
Net loss $ (69,335) $ (47,024)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 557 457
Accretion of debt discount and amortization of debt issuance costs 502 531
Stock-based compensation expense 9,729 3,107
Provision for doubtful accounts receivable 395 149
Provision for excess and obsolete inventories 124 297
Noncash operating lease expense 374 448
Change in fair value of redeemable convertible preferred stock warrant 0 6,861
Loss on disposal of property and equipment 55 98
Changes in operating assets and liabilities:    
Accounts receivable (4,280) (3,707)
Inventory (2,169) (648)
Prepaid expenses and other current assets (245) (3,331)
Other noncurrent assets 0 (204)
Accounts payable (77) (319)
Accrued compensation 2,006 569
Accrued and other current liabilities 1,631 211
Other noncurrent liabilities 270 279
Net cash used in operating activities (60,463) (41,818)
Cash flows from investing activities    
Purchases of property and equipment (841) (656)
Net cash used in investing activities (841) (656)
Cash flows from financing activities    
Proceeds from issuance of common stock upon initial public offering, net of underwriting discounts and commissions 0 256,680
Payment of other offering costs related to the initial public offering 0 (4,506)
Proceeds from exercise of common stock options 436 264
Net cash provided by (used in) financing activities 436 252,438
Net change in cash and cash equivalents (60,868) 209,964
Cash and cash equivalents at beginning of period 260,687 61,511
Cash and cash equivalents at end of period 199,819 271,475
Supplemental disclosure of cash flow information    
Cash paid for interest 2,350 2,331
Supplemental noncash disclosure    
Acquisition of property and equipment included in accounts payable and accrued liabilities 46 83
Noncash investing and financing:    
Common Stock issued on conversion of convertible preferred stock 0 117,331
Common stock warrants issued on conversion of preferred stock warrants and the reclassification of the warrant liability $ 0 $ 8,973