Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 233,782	$ 168,881	$ 434,489	$ 338,242
Cost of revenue	192,109	136,110	377,061	261,805
Gross profit	41,673	32,771	57,428	76,437
Operating expenses:
Research and development	29,772	14,413	58,631	29,144
Sales and marketing	18,359	8,254	38,822	16,516
General and administrative	43,662	15,359	82,736	30,347
Total operating expenses	91,793	38,026	180,189	76,007
Gain (loss) from operations	(50,120)	(5,255)	(122,761)	430
Interest income	1,700	444	3,585	859
Interest expense	(16,725)	(22,525)	(32,687)	(43,904)
Interest expense to related parties	(1,606)	(2,672)	(3,218)	(5,299)
Other income (expense), net	(222)	(855)	43	(930)
Loss on revaluation of warrant liabilities and embedded derivatives	0	(19,197)	0	(23,231)
Net loss before income taxes	(66,973)	(50,060)	(155,038)	(72,075)
Income tax provision	258	128	466	461
Net loss	(67,231)	(50,188)	(155,504)	(72,536)
Net loss attributable to noncontrolling interests and redeemable noncontrolling interests	(5,015)	(4,512)	(8,847)	(9,143)
Net loss attributable to Class A and Class B common stockholders	$ (62,216)	$ (45,677)	$ (146,657)	$ (63,393)
Net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in dollars per share)	$ (0.55)	$ (4.34)	$ (1.30)	$ (6.05)
Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in shares)	113,622	10,536	112,737	10,470
Product
Revenue	$ 179,899	$ 108,654	$ 321,633	$ 229,961
Cost of revenue	131,952	70,802	255,952	151,157
Installation
Revenue	17,285	26,245	39,543	40,363
Cost of revenue	22,116	37,099	46,282	47,537
Service
Revenue	23,659	19,975	46,949	39,882
Cost of revenue	19,599	19,260	47,156	43,513
Electricity
Revenue	12,939	14,007	26,364	28,036
Cost of revenue	$ 18,442	$ 8,949	$ 27,671	$ 19,598