Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total revenue	$ 200,305	$ 224,307	$ 544,860	$ 571,634
Cost of revenue	144,318	181,582	442,693	498,995
Gross profit	55,987	42,725	102,167	72,639
Operating expenses:
Research and development	19,231	23,389	61,887	82,020
Sales and marketing	11,700	17,649	37,076	56,216
General and administrative	25,428	36,599	79,471	119,335
Total operating expenses	56,359	77,637	178,434	257,571
Loss from operations	(372)	(34,912)	(76,267)	(184,932)
Interest income	254	1,214	1,405	4,799
Interest expense	(19,902)	(21,323)	(55,030)	(65,845)
Interest expense to related parties	(353)	(1,605)	(2,513)	(4,823)
Other income (expense), net	(221)	525	(4,142)	568
Gain (loss) on extinguishment of debt	1,220	0	(12,878)	0
Gain (loss) on revaluation of embedded derivatives	1,505	(540)	2,201	(1,620)
Loss before income taxes	(17,869)	(56,641)	(147,224)	(251,853)
Income tax provision	7	136	272	602
Net loss	(17,876)	(56,777)	(147,496)	(252,455)
Less: Net loss attributable to noncontrolling interests and redeemable noncontrolling interests	(5,922)	(5,027)	(17,081)	(13,874)
Net loss attributable to Class A and Class B common stockholders	$ (11,954)	$ (51,750)	$ (130,415)	$ (238,581)
Net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in dollars per share)	$ (0.09)	$ (0.44)	$ (1.01)	$ (2.09)
Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in shares)	138,964	116,330	129,571	113,948
Product
Total revenue	$ 131,076	$ 163,902	$ 346,832	$ 398,909
Cost of revenue	72,037	91,697	227,653	293,697
Installation
Total revenue	26,603	21,102	73,060	46,397
Cost of revenue	27,872	26,141	86,938	59,586
Service
Total revenue	26,141	23,665	77,496	70,158
Cost of revenue	33,214	36,427	92,836	83,111
Electricity
Total revenue	16,485	15,638	47,472	56,170
Cost of revenue	$ 11,195	$ 27,317	$ 35,266	$ 62,601