Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss		$ (307,937)	$ (315,086)	$ (193,369)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		62,609	61,608	53,454
Non-cash lease expense		33,619	20,155	9,708
Loss on disposal of property, plant and equipment		411	0	0
Revaluation of derivative contracts		1,641	(9,583)	17,532
Impairment of assets related to PPAs		130,088	113,514	0
Derecognition of loan commitment asset related to SK ecoplant Second Tranche Closing		52,792	0	0
Stock-based compensation expense		84,480	112,259	73,274
Amortization of warrants and debt issuance costs		4,772	3,032	3,797
Loss on extinguishment of debt		4,288	8,955	0
Gain on remeasurement of investment		0	0	(1,966)
Contingent consideration remeasurement		0	0	(3,623)
Interest expense on interest rate swap settlement		0	0	(641)
Unrealized foreign currency exchange loss (gain)		618	(3,267)	77
Other		450	3,532	0
Changes in operating assets and liabilities:
Accounts receivable	[1]	(89,888)	(162,864)	8,608
Contract assets	[2]	5,361	(21,525)	(21,874)
Inventories		(231,689)	(124,878)	(885)
Deferred cost of revenue	[3]	1,655	(24,282)	17,567
Customer financing receivable		0	2,510	5,428
Prepaid expenses and other assets	[4]	(5,754)	(17,590)	1,520
Other long-term assets	[5]	(3,366)	(2,617)	(2,854)
Operating lease right-of-use assets and operating lease liabilities		(32,801)	3,016	(12,953)
Financing lease liabilities		1,011	896	1,142
Accounts payable		(29,080)	86,498	13,017
Accrued warranty		1,994	5,586	1,481
Accrued expenses and other liabilities	[6]	(13,785)	43,243	(2,144)
Deferred revenue and customer deposits	[7]	(42,635)	35,156	(22,677)
Other long-term liabilities		(1,385)	(9,991)	(4,300)
Net cash used in operating activities		(372,531)	(191,723)	(60,681)
Cash flows from investing activities:
Purchase of property, plant and equipment		(83,739)	(116,823)	(49,810)
Proceeds from sale of property, plant and equipment		14	0	0
Net cash acquired from step acquisition		0	0	3,114
Net cash used in investing activities		(83,725)	(116,823)	(46,696)
Cash flows from financing activities:
Proceeds from issuance of debt	[8]	637,127	0	135,989
Payment of debt issuance costs		(19,736)	0	(1,950)
Repayment of debt		(191,390)	(120,586)	(123,374)
Make-whole payment related to PPA IIIa and PPA IV debt		0	(6,553)	0
Purchase of capped call options related to convertible notes		(54,522)	0	0
Proceeds from financing obligations		4,993	3,261	16,849
Repayment of financing obligations		(18,445)	(35,543)	(13,642)
Distributions and payments to noncontrolling interest		(2,265)	(6,854)	(5,789)
Distributions to redeemable noncontrolling interest		0	0	(49)
Proceeds from issuance of common stock		16,945	15,279	89,790
Proceeds from public share offering		0	385,396	0
Payment of public share offering costs		(35)	(13,775)	0
Buyout of noncontrolling interest		(6,864)	(12,000)	0
Proceeds from issuance of redeemable convertible preferred stock		310,957	0	217,861
Payment of issuance costs related to redeemable convertible preferred stock		(395)	0	(9,310)
Contributions from noncontrolling interest		6,979	2,815	0
Other		0	(76)	0
Net cash provided by financing activities		683,349	211,364	306,375
Effect of exchange rate changes on cash, cash equivalent and restricted cash		(281)	434	(594)
Net increase (decrease) in cash, cash equivalents, and restricted cash		226,812	(96,748)	198,404
Beginning of period		518,366	615,114	416,710
End of period		745,178	518,366	615,114
Supplemental disclosure of cash flow information:
Cash paid during the period for interest		49,929	48,980	68,739
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases		32,538	14,001	17,416
Operating cash flows from finance leases		1,097	1,085	878
Cash paid during the period for income taxes		1,455	1,439	576
Non-cash investing and financing activities:
Increase in recourse debt, non-current upon adoption of ASU 2020-06, net		0	0	121,491
Transfer from customer financing receivable to property, plant and equipment, net		0	42,758	0
Forward to purchase Class A common stock		0	4,183	0
Liabilities recorded for property, plant and equipment, net		9,297	10,988	6,095
Recognition of operating lease right-of-use asset during the year-to-date period		29,823	36,402	82,802
Recognition of finance lease right-of-use asset during the year-to-date period		1,011	896	2,210
Derecognition of the pre-modified forward contract fair value		76,242	0	0
Equity component of redeemable convertible preferred stock		16,145	0	0
Series A Redeemable Convertible Preferred Stock
Non-cash investing and financing activities:
Conversion of redeemable convertible preferred stock			$ 208,551	$ 0
Series B Redeemable Convertible Preferred Stock
Non-cash investing and financing activities:
Conversion of redeemable convertible preferred stock		$ 310,484

[1] Including changes in related party balances of $257.8 million, $0.1 million and $2.0 million for the years ended December 31, 2023, 2022 and 2021, respectively.

[2] Including change in related party balances of $6.9 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[3] Including change in related party balances of $0.9 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[4] Including change in related party balances of $2.3 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[5] Including change in related party balances of $9.1 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021. 6 Including change in related party balances of $0.1 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[6] Including change in related party balances of $3.4 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[7] Including change in related party balances of $8.4 million for the year ended December 31, 2023. There were no associated related party balances as of December 31, 2022 and 2021.

[8] Including proceeds from issuance of debt from related party of $4.6 million for the year ended December 31, 2023. There were no proceeds from issuance of debt from related party for the years ended of December 31, 2022 and 2021.