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Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
OPERATING ACTIVITIES:    
Net loss $ (287,783) $ (325,367)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 29,686 31,933
Operating lease costs 25,013 23,357
Gain on extinguishment of convertible notes (13,672) 0
Stock-based compensation 123,027 104,045
Unrealized losses on marketable equity securities 0 47,225
Impairment of non-marketable equity securities 5,000 0
Interest income received on marketable debt securities 7,677 0
Other (615) 1,492
Changes in operating assets and liabilities:    
Accounts receivable, net (5,971) 316
Inventory, net (19,406) (10,349)
Prepaid expenses and other current assets, net (8,607) (9,192)
Other assets, net 779 (1,561)
Accounts payable and accrued liabilities (996) (19,813)
Operating lease liabilities (28,022) (27,029)
Deferred revenue 15,503 9,598
Net cash used in operating activities (158,387) (175,345)
INVESTING ACTIVITIES:    
Purchases of marketable debt securities 0 (307,323)
Maturities of marketable debt securities 307,323 35,000
Sales of marketable equity securities 0 19,195
Purchases of non-marketable equity securities (9,000) (2,500)
Purchases of property and equipment (20,458) (16,210)
Net cash provided by (used in) investing activities 277,865 (271,838)
FINANCING ACTIVITIES:    
Proceeds from issuance of common stock upon exercise of stock options 6,046 2,597
Proceeds from issuances of common stock under employee stock purchase plan 7,680 7,212
Employee taxes paid related to net share settlement of restricted stock units (25,183) (7,658)
Repurchase of treasury stock (45,010) 0
Payment of debt issuance costs (12,289) 0
Proceeds from unwinding of convertible note hedges 5,030 0
Other 2,831 (212)
Net cash (used in) provided by financing activities (60,895) 1,939
Net effect of foreign exchange rate changes on cash, cash equivalents and restricted cash 1,177 (75)
Net increase (decrease) in cash, cash equivalents and restricted cash 59,760 (445,319)
Cash, cash equivalents and restricted cash—Beginning of period 629,755 1,133,687
Cash, cash equivalents and restricted cash—End of period 689,515 688,368
Reconciliation of cash, cash equivalents and restricted cash:    
Cash and cash equivalents 580,013 585,022
Restricted cash 109,502 103,346
Total cash, cash equivalents and restricted cash $ 689,515 $ 688,368