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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows from operating activities:    
Net loss $ (21,878) $ (13,522)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,448 1,767
Amortization of debt issuance costs 12 12
Stock-based compensation 4,415 1,684
Change in fair value of preferred stock warrant liability 0 2,430
Changes in assets and liabilities:    
Accounts receivable 6,740 (23)
Inventory (12,138) (9,889)
Prepaid expenses and other current assets (1,974) 1,122
Accounts payable and accrued expenses (20,736) (8,045)
Other long-term liabilities 2,232 200
Deferred revenue (592) 278
Net cash used in operating activities (40,471) (23,986)
Cash flows from investing activities:    
Purchase of property and equipment (8,355) (3,727)
Changes in security deposits 5 (287)
Net cash used in investing activities (8,350) (4,014)
Cash flows from financing activities:    
Proceeds from the exercise of stock options 1,454 587
Payments of deferred offering costs (744) 0
Net cash provided by financing activities 710 587
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash (120) (476)
Net decrease in cash, cash equivalents, and restricted cash (48,231) (27,889)
Cash, cash equivalents, and restricted cash—beginning of period 288,576 127,251
Cash, cash equivalents, and restricted cash—end of period 240,345 99,362
Supplemental disclosures of cash flow information:    
Cash paid for interest 20 39
Cash paid for taxes 14 29
Noncash investing and financing activities:    
Purchase of property and equipment included in accounts payable 463 1,008
Non-cash exercise of common stock warrants 28 0
Stock-based compensation included in capitalized internal-use software 261 0
Reconciliation of cash, cash equivalents, and restricted cash:    
Cash and cash equivalents 239,715 99,362
Restricted cash 630 0
Total cash, cash equivalents, and restricted cash $ 240,345 $ 99,362