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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Cash flows from operating activities    
Net income (loss) $ 49,944 $ (41,907)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Stock-based compensation 30,435 29,859
Amortization of premiums and accretion of discounts on investment securities (3,740) (3,758)
Amortization of intangible assets 7,631 1,364
Gain on strategic investment 0 (3,601)
Loss on sale of investment securities 0 505
Depreciation 468 828
Changes in operating assets and liabilities:    
Accounts receivable, net (5,431) (19,657)
Interest and other receivables (2,612) (1,419)
Inventory (43,795) (2,519)
Prepaid expenses (6,965) (2,497)
Other assets 0 (115)
Operating lease right-of-use assets 3,649 3,405
Accounts payable 2,339 6,065
Accrued liabilities 27,043 26,875
Operating lease liabilities (2,089) (3,342)
Long-term liabilities (2,785) 182
Net cash provided by (used in) operating activities 54,092 (9,732)
Cash flows from investing activities    
Purchases of investment securities (217,846) (228,675)
Sale and maturity of investment securities 147,615 266,910
Intangible assets 0 (40,000)
Net cash used in investing activities (70,231) (1,765)
Cash flows from financing activities    
Proceeds from issuance of common stock, net of issuance costs 4,608 6,944
Net cash provided by financing activities 4,608 6,944
Effect of exchange rate changes on cash 8 (2)
Net decrease in cash, cash equivalents and restricted cash (11,523) (4,555)
Cash, cash equivalents and restricted cash    
Beginning of period 194,427 120,616
End of period 182,904 116,061
Supplemental disclosure of noncash information:    
Accrued inventory purchases 1,506 0
Accrued milestone and contingent payments in connection with asset acquisition $ 50,000 $ 29,583