Restatement of Previously Issued Consolidated Financial Statements - Consolidated Statements of Cash Flows (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (81,642,000)	$ (108,752,000)
Depreciation and amortization	13,034,000	14,225,000
Write-off of property, plant and equipment, net	1,000	1,000
Revaluation of derivative contracts	241,000	87,000
Stock -based compensation	23,019,000	67,822,000
Loss (gain) on long-term REC purchase contract	(4,000)	59,000
Amortization of debt issuance cost	4,755,000	5,152,000
Accounts receivable	2,136,000	4,131,000
Inventories	2,083,000	11,087,000
Deferred cost of revenue	(19,494,000)	(11,084,000)
Customer financing receivable and other	1,240,000	1,339,000
Prepaid expenses and other current assets	3,060,000	6,628,000
Other long-term assets	(2,924,000)	(416,000)
Accounts payable	4,822,000	(2,464,000)
Accrued warranty	681,000	(2,697,000)
Accrued expenses and other current liabilities	509,000	(373,000)
Deferred revenue and customer deposits	5,253,000	1,244,000
Other long-term liabilities	1,184,000	4,166,000
Net cash used in operating activities	(27,948,000)	(9,845,000)
Cash flows from investing activities:
Purchase of property, plant and equipment	(12,360,000)	(11,946,000)
Payments for acquisition of intangible assets	0	(848,000)
Proceeds from maturity of marketable securities	0	104,500,000
Net cash provided by (used in) investing activities	(12,360,000)	91,706,000
Cash flows from financing activities:
Repayment of debt	(9,128,000)	(5,016,000)
Repayment of debt to related parties	(2,105,000)	(778,000)
Proceeds from financing obligations	0	10,961,000
Repayment of financing obligations	(2,503,000)	(1,883,000)
Distributions to noncontrolling and redeemable noncontrolling interests	(4,270,000)	(3,189,000)
Proceeds from issuance of common stock	4,845,000	7,493,000
Net cash provided by financing activities	16,839,000	7,588,000
Net increase (decrease) in cash, cash equivalents, and restricted cash	(23,469,000)	89,449,000
Beginning of period	377,388,000	280,485,000
End of period	353,919,000	369,934,000
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	17,790,000	20,383,000
Cash paid during the period for taxes	29,000	222,000
Stock -based compensation	$ 23,019,000	67,822,000
Previously Reported
Cash flows from operating activities:
Net loss		(88,273,000)
Depreciation and amortization		11,271,000
Write-off of property, plant and equipment, net		1,000
Revaluation of derivative contracts		(453,000)
Stock -based compensation		63,882,000
Loss (gain) on long-term REC purchase contract		59,000
Amortization of debt issuance cost		5,152,000
Accounts receivable		816,000
Inventories		15,932,000
Deferred cost of revenue		26,014,000
Customer financing receivable and other		1,339,000
Prepaid expenses and other current assets		5,194,000
Other long-term assets		83,000
Accounts payable		(2,464,000)
Accrued warranty		(2,500,000)
Accrued expenses and other current liabilities		823,000
Deferred revenue and customer deposits		(44,533,000)
Other long-term liabilities		3,487,000
Net cash used in operating activities		(4,170,000)
Cash flows from investing activities:
Purchase of property, plant and equipment		(8,543,000)
Payments for acquisition of intangible assets		(848,000)
Proceeds from maturity of marketable securities		104,500,000
Net cash provided by (used in) investing activities		95,109,000
Cash flows from financing activities:
Repayment of debt		(5,016,000)
Repayment of debt to related parties		(778,000)
Proceeds from financing obligations		0
Repayment of financing obligations		0
Distributions to noncontrolling and redeemable noncontrolling interests		(3,189,000)
Proceeds from issuance of common stock		7,493,000
Net cash provided by financing activities		(1,490,000)
Net increase (decrease) in cash, cash equivalents, and restricted cash		89,449,000
Beginning of period		280,485,000
End of period		369,934,000
Supplemental disclosure of cash flow information:
Cash paid during the period for interest		14,545,000
Cash paid during the period for taxes		222,000
Stock -based compensation		63,882,000
Restatement Adjustment
Cash flows from operating activities:
Net loss		(21,056,000)
Depreciation and amortization		2,954,000
Write-off of property, plant and equipment, net		0
Revaluation of derivative contracts		540,000
Stock -based compensation		3,940,000
Loss (gain) on long-term REC purchase contract		0
Amortization of debt issuance cost		0
Accounts receivable		(98,000)
Inventories		(4,845,000)
Deferred cost of revenue		(37,098,000)
Customer financing receivable and other		0
Prepaid expenses and other current assets		1,423,000
Other long-term assets		(396,000)
Accounts payable		0
Accrued warranty		50,000
Accrued expenses and other current liabilities		(1,196,000)
Deferred revenue and customer deposits		49,428,000
Other long-term liabilities		679,000
Net cash used in operating activities		(5,675,000)
Cash flows from investing activities:
Purchase of property, plant and equipment		(3,403,000)
Payments for acquisition of intangible assets		0
Proceeds from maturity of marketable securities		0
Net cash provided by (used in) investing activities		(3,403,000)
Cash flows from financing activities:
Repayment of debt		0
Repayment of debt to related parties		0
Proceeds from financing obligations		10,961,000
Repayment of financing obligations		(1,883,000)
Distributions to noncontrolling and redeemable noncontrolling interests		0
Proceeds from issuance of common stock		0
Net cash provided by financing activities		9,078,000
Net increase (decrease) in cash, cash equivalents, and restricted cash		0
Beginning of period		0
End of period		0
Supplemental disclosure of cash flow information:
Cash paid during the period for interest		5,838,000
Cash paid during the period for taxes		0
Stock -based compensation		3,940,000
Capitalized Stock-Based Compensation | Restatement Adjustment
Cash flows from operating activities:
Stock -based compensation		4,400,000
Deferred cost of revenue		94,000
Supplemental disclosure of cash flow information:
Stock -based compensation		4,400,000
Capitalized Stock-Based Compensation, Managed Services Program | Restatement Adjustment
Cash flows from operating activities:
Stock -based compensation		(460,000)
Supplemental disclosure of cash flow information:
Stock -based compensation		(460,000)
Reclassification Of Lease Arrangements | Restatement Adjustment
Cash flows from operating activities:
Deferred cost of revenue		(37,192,000)
Difference between Revenue Guidance in Effect before and after Topic 606
Cash flows from operating activities:
Net loss		577,000
Depreciation and amortization		0
Write-off of property, plant and equipment, net		0
Revaluation of derivative contracts		0
Stock -based compensation		0
Loss (gain) on long-term REC purchase contract		0
Amortization of debt issuance cost		0
Accounts receivable		3,413,000
Inventories		0
Deferred cost of revenue		0
Customer financing receivable and other		0
Prepaid expenses and other current assets		11,000
Other long-term assets		(103,000)
Accounts payable		0
Accrued warranty		(247,000)
Accrued expenses and other current liabilities		0
Deferred revenue and customer deposits		(3,651,000)
Other long-term liabilities		0
Net cash used in operating activities		0
Cash flows from investing activities:
Purchase of property, plant and equipment		0
Payments for acquisition of intangible assets		0
Proceeds from maturity of marketable securities		0
Net cash provided by (used in) investing activities		0
Cash flows from financing activities:
Repayment of debt		0
Repayment of debt to related parties		0
Proceeds from financing obligations		0
Repayment of financing obligations		0
Distributions to noncontrolling and redeemable noncontrolling interests		0
Proceeds from issuance of common stock		0
Net cash provided by financing activities		0
Net increase (decrease) in cash, cash equivalents, and restricted cash		0
Beginning of period		0
End of period		0
Supplemental disclosure of cash flow information:
Cash paid during the period for interest		0
Cash paid during the period for taxes		0
Stock -based compensation		$ 0