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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating activities |  |  |
Net loss | $ (1,368,833) | $ (724,008) | $ (459,965)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation of long-lived assets | 51,986 | 30,402 | 20,900
Amortization of intangible assets | 19,097 | 21,195 | 2,469
Lower of cost or net realizable value inventory adjustment and provision for excess and obsolete inventory | 93,742 | 1,957 | 2,158
Stock-based compensation | 162,908 | 179,627 | 76,470
Provision for losses on accounts receivable | 8,407 |  |
Loss on extinguishment of debt |  | 986 |
Amortization of debt issuance costs and discount on convertible senior notes | 2,213 | 2,710 | 3,018
Provision for common stock warrants | 11,209 | 12,683 | 6,566
Deferred income tax (benefit)/expense | (8,534) | 170 | (16,197)
Impairment | 20,014 | 5,218 | 10,224
Impairment of goodwill | 249,480 |  |
Loss/(benefit) on service contracts | 56,633 | (8,645) | 63,124
Fair value adjustment to contingent consideration | 30,024 | 16,468 | 11,176
Net realized loss on investments | 12,806 | 1,395 | 81
(Accretion)/amortization of premium on available-for-sale securities | (6,610) | 990 | 9,232
Lease origination costs | (9,600) | (8,815) | (10,410)
Loss on disposal of assets |  | 268 |
Change in fair value for equity securities | (11,421) | 18,159 | (6,738)
Loss on equity method investments | 41,786 | 20,166 | 5,704
Changes in operating assets and liabilities that provide (use) cash: |  |  |
Accounts receivable | (122,768) | (30,920) | (27,601)
Inventory | (408,631) | (365,666) | (100,949)
Contract assets | (40,258) | (39,515) | (10,608)
Prepaid expenses and other assets | 32,549 | (92,521) | (32,392)
Accounts payable, accrued expenses, and other liabilities | 21,722 | 88,458 | 24,908
Payments of contingent consideration | (2,895) |  |
Deferred revenue and other contract liabilities | 58,404 | 40,615 | 70,654
Net cash used in operating activities | (1,106,570) | (828,623) | (358,176)
Investing activities |  |  |
Purchases of property, plant and equipment | (665,208) | (436,610) | (172,166)
Purchase of intangible assets |  |  | (928)
Proceeds from sales of long-lived assets | 1,104 |  |
Purchases of equipment related to power purchase agreements and equipment related to fuel delivered to customers | (30,918) | (27,263) | (20,172)
Purchase of available-for-sale securities |  | (838,622) | (3,159,372)
Proceeds from sales of available-for-sale securities | 345,264 | 475,676 | 778,038
Proceeds from maturities of available-for-sale securities | 1,006,161 | 247,879 | 1,129,088
Purchase of equity securities |  | (5,000) | (169,793)
Proceeds from sales of equity securities | 144,250 |  | 28,536
Net cash paid for acquisitions |  | (56,906) | (136,526)
Cash paid for non-consolidated entities and non-marketable equity securities | (72,601) | (38,524) | (17,596)
Net cash provided by/(used in) investing activities | 728,052 | (679,370) | (1,740,891)
Financing activities |  |  |
Proceeds from exercise of warrants, net of transaction costs |  |  | 15,445
Payments of contingent consideration | (10,105) | (2,667) | (1,541)
Proceeds from public and private offerings, net of transaction costs |  |  | 3,587,833
Payments of tax withholding on behalf of employees for net stock settlement of stock-based compensation | (10,007) | (23,735) | (32,092)
Proceeds from exercise of stock options | 1,613 | 2,301 | 7,520
Principal payments on long-term debt | (6,010) | (121,389) | (48,681)
Proceeds from finance obligations | 104,251 | 122,886 | 108,925
Principal repayments of finance obligations and finance leases | (73,625) | (54,853) | (39,630)
Net cash provided by/(used in) financing activities | 6,117 | (77,457) | 3,597,779
Effect of exchange rate changes on cash | (7,799) | 2,600 | (802)
(Decrease)/increase in cash and cash equivalents | (555,597) | (1,790,639) | 1,168,865
Increase in restricted cash | 175,397 | 207,789 | 329,045
Cash, cash equivalents, and restricted cash beginning of period | 1,549,344 | 3,132,194 | 1,634,284
Cash, cash equivalents, and restricted cash end of period | 1,169,144 | 1,549,344 | 3,132,194
Supplemental disclosure of cash flow information |  |  |
Cash paid for interest, net of capitalized interest of $8.1 million, $13.1 million and $4.8 million | 41,811 | 35,520 | 19,327
Summary of non-cash activity |  |  |
Recognition of right of use asset - finance leases | 8,908 | 25,650 | 28,180
Recognition of right of use asset - operating leases | 90,795 | 178,222 | 110,337
Net tangible assets (liabilities) acquired (assumed) in a business combination |  | 5,342 | (26,066)
Common stock issued for acquisitions |  | 6,107 | 46,697
Intangible assets acquired in a business combination |  | 73,952 | 120,962
Conversion of convertible senior notes to common stock |  |  | 15,345
Net transfers between inventory and long-lived assets | 728 | 1,619 | 6,297
Earnouts from acquisitions paid in stock | 8,000 |  |
Accrued purchase of fixed assets, cash to be paid in subsequent period | $ 160,578 | $ 62,320 | 14,006
Settlement of liability from acquisitions |  |  | $ 7,100

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