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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities    
Net income $ 117,432 $ 82,709
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 38,900 56,599
Amortization of premiums and accretion of discounts on investment securities (4,754) (6,487)
Amortization of intangible assets 8,167 9,975
Depreciation 669 694
Changes in operating assets and liabilities:    
Accounts receivable, net (17,111) 58
Interest and other receivables (17,626) (8,071)
Inventory (13,305) (45,126)
Prepaid expenses (5,187) (12,459)
Other assets (2,006) 117
Operating lease right-of-use assets 6,471 5,124
Accounts payable 5,555 1,538
Accrued liabilities 49,126 40,285
Operating lease liabilities (3,597) (7,793)
Long-term liabilities (4,167) 175
Net cash provided by operating activities 158,567 117,338
Cash flows from investing activities    
Purchases of investment securities (534,951) (369,333)
Sale and maturity of investment securities 387,779 216,715
Intangible assets (98,838) 0
Purchases of property and equipment (685) (70)
Net cash used in investing activities (246,695) (152,688)
Cash flows from financing activities    
Proceeds from issuance of common stock, net of issuance costs 27,217 4,876
Net cash provided by financing activities 27,217 4,876
Effect of exchange rate changes on cash 19 (34)
Net decrease in cash, cash equivalents and restricted cash (60,892) (30,508)
Cash, cash equivalents and restricted cash    
Beginning of period 328,359 194,427
End of period 267,467 163,919
Supplemental disclosure of noncash information:    
Accrued inventory purchases 863 760
Accrued milestone and contingent payments in connection with asset acquisition 0 50,000
Stock based compensation capitalized $ 233 $ 407