Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (179,087)	$ (323,466)	$ (291,276)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	52,279	78,584	53,887
Non-Cash Lease Expense	5,328
Write-off of property, plant and equipment, net	38	3,117	939
Impairment of equity method investment	4,236	11,302	0
Write-off of PPA II and PPA IIIb decommissioned assets	0	70,543	0
Debt make-whole expense	0	5,934	0
Revaluation of derivative contracts	(497)	2,779	29,021
Stock-based compensation	73,893	196,291	168,482
Loss on long-term REC purchase contract	72	53	200
Revaluation of stock warrants	0	0	(9,108)
Loss on extinguishment of debt	11,785	0	0
Amortization of debt issuance and premium cost, net	6,455	22,130	25,437
Changes in operating assets and liabilities:
Accounts receivable	(61,685)	51,952	(55,023)
Inventories	(33,004)	18,425	(36,974)
Deferred cost of revenue	19,910	(21,992)	14,223
Customer financing receivable and other	5,159	5,520	4,878
Prepaid expenses and other current assets	(3,124)	8,643	(8,032)
Other long-term assets	2,904	3,618	(202)
Accounts payable	(620)	(11,310)	18,307
Accrued warranty	(241)	(6,603)	1,498
Accrued expenses and other current liabilities	17,753	6,728	(5,984)
Deferred revenue and customer deposits	(12,972)	37,146	(21,774)
Operating lease liabilities	(2,855)	0	0
Other long-term liabilities	(4,523)	4,376	19,553
Net cash provided by (used in) operating activities	(98,796)	163,770	(91,948)
Cash flows from investing activities:
Purchase of property, plant and equipment	(37,913)	(51,053)	(45,205)
Payments for acquisition of intangible assets	0	0	(3,256)
Purchase of marketable securities	0	0	(103,914)
Proceeds from maturity of marketable securities	0	104,500	27,000
Net cash provided by (used in) investing activities	(37,913)	53,447	(125,375)
Cash flows from financing activities:
Proceeds from issuance of debt	300,000	0	0
Proceeds from issuance of debt to related parties	30,000	0	0
Repayment of debt	(176,522)	(119,277)	(18,770)
Repayment of debt to related parties	(2,105)	(2,200)	(1,390)
Debt make-whole payment	0	(5,934)	0
Debt issuance costs	(13,247)	0	0
Proceeds from financing obligations	26,279	72,334	70,265
Repayment of financing obligations	(10,756)	(8,954)	(6,188)
Contribution from noncontrolling interest	6,513	0	0
Payments to noncontrolling and redeemable noncontrolling interests	0	(56,459)	0
Distributions to noncontrolling and redeemable noncontrolling interests	(7,622)	(12,537)	(15,250)
Proceeds from issuance of common stock	23,491	12,713	1,521
Proceeds from public offerings, net of underwriting discounts and commissions	0	0	292,529
Payments of initial public offering issuance costs	0	0	(5,521)
Net cash provided by (used in) financing activities	176,031	(120,314)	317,196
Net increase in cash, cash equivalents, and restricted cash	39,322	96,903	99,873
Beginning of period	377,388	280,485	180,612
End of period	416,710	377,388	280,485
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	71,651	69,851	59,549
Operating cash flows from operating leases	2,855	0	0
Operating cash flows from financing leases	16	0	0
Financing cash flows from financing leases	45	0	0
Cash paid during the period for income taxes	371	860	1,748
Non-cash investing and financing activities:
Liabilities recorded for property, plant and equipment	7,175	1,745	12,236
Operating lease liabilities arising from obtaining right-of-use assets upon adoption of new lease guidance	39,775
Recognition of operating lease right-of-use asset during the year	12,829
Recognition of financing lease right-of-use asset during the year	385
Liabilities recorded for noncontrolling and redeemable noncontrolling interest	0	0	3,180
Reclassification of redeemable convertible preferred stock warrant liability to additional paid-in capital	0	0	882
Conversion of redeemable convertible preferred stock into additional paid-in capital	0	0	1,465,841
Conversion of 6% and 8% convertible promissory notes into additional paid-in capital to related parties	0	6,933	40,110
Conversion of 10% convertible promissory notes to related party into Class A common stock	50,800	0	0
Reclassification of derivative liability into additional paid-in capital	0	0	177,208
Reclassification of prior year prepaid initial public offering costs to additional paid-in capital	0	0	4,732
Accrued distributions to equity investors	0	373	576
Accrued interest for notes	1,298	1,812	19,041
Accrued interest for notes to related parties	0	0	2,733
Adjustment of embedded derivative related to debt extinguishment	24,071	0	0
Convertible Promissory Notes, Interest Rate at 8% | Convertible promissory notes
Non-cash investing and financing activities:
Conversion of convertible promissory note into equity	0	0	181,469
Convertible Promissory Notes Interest Rate 10% Due December 2021 | Convertible promissory notes
Non-cash investing and financing activities:
Conversion of convertible promissory note into equity	$ 252,797	$ 0	$ 0