Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues	$ 228,470	$ 187,856	$ 422,477	$ 344,555
Cost of revenue	191,126	161,607	330,482	298,375
Gross profit	37,344	26,249	91,995	46,180
Operating expenses:
Research and development	25,673	19,377	48,968	42,656
Sales and marketing	22,727	11,427	42,679	25,376
General and administrative	31,655	24,945	57,456	54,043
Total operating expenses	80,055	55,749	149,103	122,075
Loss from operations	(42,711)	(29,500)	(57,108)	(75,895)
Interest income	76	332	150	1,151
Interest expense	(14,553)	(14,374)	(29,284)	(35,128)
Interest expense - related parties	0	(794)	0	(2,160)
Other income (expense), net	22	(3,913)	(63)	(3,921)
Loss on extinguishment of debt	0	0	0	(14,098)
(Loss) gain on revaluation of embedded derivatives	(942)	412	(1,460)	696
Loss before income taxes	(58,108)	(47,837)	(87,765)	(129,355)
Income tax provision	313	141	437	265
Net loss	(58,421)	(47,978)	(88,202)	(129,620)
Less: Net loss attributable to noncontrolling interest and redeemable noncontrolling interest	(4,558)	(5,466)	(9,450)	(11,159)
Net loss attributable to Class A and Class B common stockholders	$ (53,863)	$ (42,512)	$ (78,752)	$ (118,461)
Net loss per share attributable to Class A and Class B common stockholders, basic (in dollars per share)	$ (0.31)	$ (0.34)	$ (0.46)	$ (0.95)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in dollars per share)	$ (0.31)	$ (0.34)	$ (0.46)	$ (0.95)
Weighted average shares used to compute net loss per share available to Class A and Class B common stockholders, basic (in shares)	172,749	125,928	171,753	124,823
Weighted average shares used to compute net loss per share available to Class A and Class B common stockholders, diluted (in shares)	172,749	125,928	171,753	124,823
Product
Revenues	$ 146,867	$ 116,197	$ 284,797	$ 215,756
Cost of revenue	108,891	83,127	196,185	155,616
Installation
Revenues	28,879	29,839	31,538	46,457
Cost of revenue	36,515	38,287	41,140	59,066
Service
Revenues	35,707	26,208	72,124	51,355
Cost of revenue	35,565	28,652	71,683	59,622
Electricity
Revenues	17,017	15,612	34,018	30,987
Cost of revenue	$ 10,155	$ 11,541	$ 21,474	$ 24,071