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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
OPERATING ACTIVITIES      
Net income (loss) $ 137,761 $ (854,014) $ (140,413)
Adjustments to reconcile net income (loss) to net cash used in operating activities:      
Depreciation and amortization expense 44,947 44,988 46,275
Non-cash interest expense, including interest expenses associated with debt issuance costs 1,540 2,087 2,602
Stock-based compensation 10,216 18,471 45,109
Change in fair value of derivative liability 0 (1,477) 7,731
Change in fair value of warrant liability 3,222 0 0
Non-cash lease expense 2,652 3,023 2,928
Accretion of asset retirement obligations 237 236 234
Impairment of inventory 0 14,673 0
Impairment of deferred costs with suppliers 0 13,409 0
Impairment of energy storage systems 2,020 836 4,683
Loss on disposal of property and equipment 842 0 0
Impairment of project assets 1,654 887 176
Impairment of right-of-use assets 1,357 2,096 0
Impairment of parent company guarantees 0 104,134 0
Impairment of goodwill 0 547,152 0
Impairment of deferred services 0 3,386 0
Impairment of other assets 25,088 0 0
Write-off of accrued expenses and other liabilities (38,318) 0 0
Net accretion of discount on investments 0 (29) (1,755)
Income tax benefit from release of valuation allowance 0 0 (335)
Provision for credit losses on accounts receivable 3,046 3,978 1,447
Net loss on investments 0 0 1,561
Gain on extinguishment of debt (220,047) 0 (59,121)
Other 276 (251) (949)
Changes in operating assets and liabilities:      
Accounts receivable 17,729 133,057 (80,887)
Inventory 6,333 2,766 (18,291)
Deferred costs with suppliers 522 6,523 30,322
Other assets 9,393 6,537 (18,036)
Contract origination costs, net (1,490) (2,129) (5,924)
Project assets 14,762 (8,877) (5,392)
Accounts payable (19,850) (48,146) (5,241)
Accrued expense and other liabilities 7,447 (20,293) (15,762)
Deferred revenue (280) (6,878) 4,573
Operating lease liabilities, net (4,198) (2,795) (2,912)
Net cash provided by (used in) operating activities 6,861 (36,650) (207,377)
INVESTING ACTIVITIES      
Acquisitions, net of cash acquired 0 0 (1,847)
Purchase of available-for-sale investments 0 0 (60,002)
Proceeds from maturities of available-for-sale investments 0 8,250 141,810
Proceeds from sales of available-for-sale investments 0 0 73,917
Purchase of energy storage systems 0 (275) (2,634)
Capital expenditures on internally-developed software (6,602) (11,275) (14,097)
Distribution from equity method investment 0 0 85
Purchase of property and equipment 0 (217) (1,505)
Net cash (used in) provided by investing activities (6,602) (3,517) 135,727
FINANCING ACTIVITIES      
Proceeds from exercise of stock options 0 0 276
Repayment of financing obligations (12,159) (8,494) (12,686)
Proceeds from issuance of convertible notes, net of issuance costs of $0, $0 and $7,601 for the years ended December 31, 2025, 2024 and 2023, respectively 0 0 232,399
Repayment of convertible notes 0 0 (99,754)
Proceeds from issuance of senior secured notes, net of issuance costs of $5,246, $0 and $0 for the years ended December 31, 2025, 2024 and 2023, respectively 4,754 0 0
Purchase of capped call options 0 0 (27,840)
(Redemption of) investment from non-controlling interests (158) 56 (56)
Repayment of notes payable 0 0 (2,101)
Net cash (used in) provided by financing activities (7,563) (8,438) 90,238
Effect of exchange rate changes on cash, cash equivalents and restricted cash (80) 215 (16)
Net (decrease) increase in cash, cash equivalents and restricted cash (7,384) (48,389) 18,572
Cash, cash equivalents and restricted cash, beginning of year 58,085 106,475 87,903
Cash, cash equivalents and restricted cash, end of period 50,701 58,085 106,475
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION      
Cash paid for interest 14,571 16,198 14,588
Cash paid for income taxes 481 680 235
NON-CASH INVESTING AND FINANCING ACTIVITIES      
Change in asset retirement costs and asset retirement obligation 91 85 443
Right-of-use asset obtained in exchange for lease liability 961 5,485 2,782
Debt issued in exchange for extinguishment of existing notes 121,954 0 0
Debt retired in exchange for issuance of new notes 343,901 0 0
Warrants issued in connection with debt exchange 1,899 0 0
Stock-based compensation capitalized to internal-use software 1,015 2,757 4,331
RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH WITHIN THE CONSOLIDATED BALANCE SHEETS TO THE AMOUNTS SHOWN IN THE STATEMENTS OF CASH FLOWS ABOVE:      
Cash and cash equivalents 48,915 56,299 105,375
Restricted cash included in other noncurrent assets 1,786 1,786 1,100
Total cash, cash equivalents, and restricted cash $ 50,701 $ 58,085 $ 106,475

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