Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total revenue	$ 972,176	$ 794,247	$ 785,177
Cost of revenue	774,595	628,454	687,590
Gross profit	197,581	165,793	97,587
Operating expenses:
Research and development	103,396	83,577	104,168
Sales and marketing	86,499	55,916	73,573
General and administrative	122,188	107,085	152,650
Total operating expenses	312,083	246,578	330,391
Loss from operations	(114,502)	(80,785)	(232,804)
Interest income	262	1,475	5,661
Interest expense	(69,025)	(76,276)	(87,480)
Interest expense - related parties	0	(2,513)	(6,756)
Other income (expense), net	(8,139)	(8,318)	706
Gain (loss) on extinguishment of debt	0	(12,878)	0
(Loss) gain on revaluation of embedded derivatives	(919)	464	(2,160)
Loss before income taxes	(192,323)	(178,831)	(322,833)
Income tax provision	1,046	256	633
Net loss	(193,369)	(179,087)	(323,466)
Less: Net loss attributable to noncontrolling interest and redeemable noncontrolling interest	(28,924)	(21,534)	(19,052)
Net loss attributable to Class A and Class B common stockholders	(164,445)	(157,553)	(304,414)
Less: deemed dividend to noncontrolling interest	0	0	(2,454)
Net loss available to Class A and Class B common stockholders	$ (164,445)	$ (157,553)	$ (306,868)
Net loss per share attributable to Class A and Class B common stockholders, basic (in dollars per share)	$ (0.95)	$ (1.14)	$ (2.67)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in dollars per share)	$ (0.95)	$ (1.14)	$ (2.67)
Weighted average shares used to compute net loss per share available to Class A and Class B common stockholders, basic (in shares)	173,438	138,722	115,118
Weighted average shares used to compute net loss per share available to Class A and Class B common stockholders, diluted (in shares)	173,438	138,722	115,118
Product
Total revenue	$ 663,512	$ 518,633	$ 557,336
Cost of revenue	471,654	332,724	435,479
Installation
Total revenue	96,059	101,887	60,826
Cost of revenue	110,214	116,542	76,487
Service
Total revenue	144,184	109,633	95,786
Cost of revenue	148,286	132,329	100,238
Electricity
Total revenue	68,421	64,094	71,229
Cost of revenue	$ 44,441	$ 46,859	$ 75,386