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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Operating activities:    
Net income (loss) $ (43,082) $ 40,566
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation, depletion and amortization 55,939 37,076
Accretion of discount on short-term investments (23,669) (17,334)
Gain on early extinguishment of debt (46,265) 0
Stock-based compensation expense 18,623 19,041
Amortization of debt issuance costs 2,864 2,650
Lower of cost or net realizable value reserve 15,085 0
Deferred income taxes (16,240) 13,156
Other 1,957 1,091
Decrease (increase) in operating assets:    
Accounts receivable (including related party) (4,520) 19,676
Inventories (42,851) (25,498)
Government grant receivable 11,456 0
Prepaid expenses, other current and non-current assets (2,390) (1,437)
Increase (decrease) in operating liabilities:    
Accounts payable and accrued liabilities (1,303) 8,601
Income taxes payable 0 (21,163)
Deferred revenue 50,000 0
Deferred government grant 4,086 0
Other current and non-current liabilities 3,182 55
Net cash provided by (used in) operating activities (17,128) 76,480
Investing activities:    
Additions to property, plant and equipment (144,768) (188,927)
Purchases of short-term investments (1,150,609) (705,241)
Proceeds from sales of short-term investments 131,776 461,042
Proceeds from maturities of short-term investments 1,195,202 769,907
Proceeds from government awards used for construction 96 1,050
Net cash provided by investing activities 31,697 337,831
Financing activities:    
Proceeds from issuance of long-term debt 747,500 0
Payment of debt issuance costs (16,149) 0
Payments to retire long-term debt (428,599) 0
Purchase of capped call options (65,332) 0
Repurchases of common stock (225,068) 0
Principal payments on debt obligations and finance leases (1,738) (2,101)
Tax withholding on stock-based awards (4,577) (6,476)
Net cash provided by (used in) financing activities 6,037 (8,577)
Net change in cash, cash equivalents and restricted cash 20,606 405,734
Cash, cash equivalents and restricted cash beginning balance 264,988 143,509
Cash, cash equivalents and restricted cash ending balance 285,594 549,243
Reconciliation of cash, cash equivalents and restricted cash:    
Cash and cash equivalents 284,434 547,668
Restricted cash, current 811 1,228
Restricted cash, non-current 349 347
Total cash, cash equivalents and restricted cash $ 285,594 $ 549,243