Restatement of Previously Issued Consolidated Financial Statements - Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	$ 156,699	$ 147,001
Cost of revenue	136,768	145,437
Gross profit	19,931	1,564
Research and development	23,279	28,859
Sales and marketing	13,949	20,373
General and administrative	29,098	39,074
Total operating expenses	66,326	88,306
Loss from operations	(46,395)	(86,742)
Interest income	819	1,885
Interest expense	(20,754)	(21,800)
Interest expense to related parties	(1,366)	(1,612)
Other expense, net	(8)	265
Loss on revaluation of warrant liabilities and embedded derivatives	284	(540)
Loss before income taxes	(81,518)	(108,544)
Income tax provision	(124)	(208)
Net loss	(81,642)	(108,752)
Less: net loss attributable to noncontrolling interests and redeemable noncontrolling interests	5,693	3,832
Net loss attributable to Class A and Class B common stockholders	(75,949)	(104,920)
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		200,707
Cost of revenue		184,952
Gross profit		15,755
Research and development		28,859
Sales and marketing		20,463
General and administrative		39,074
Total operating expenses		88,396
Loss from operations		(72,641)
Interest income		1,885
Interest expense		(15,962)
Interest expense to related parties		(1,612)
Other expense, net		265
Loss on revaluation of warrant liabilities and embedded derivatives		0
Loss before income taxes		(88,065)
Income tax provision		(208)
Net loss		(88,273)
Less: net loss attributable to noncontrolling interests and redeemable noncontrolling interests		3,832
Net loss attributable to Class A and Class B common stockholders		(84,441)
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(52,976)
Cost of revenue		(38,300)
Gross profit		(14,676)
Research and development		0
Sales and marketing		2
General and administrative		0
Total operating expenses		2
Loss from operations		(14,678)
Interest income		0
Interest expense		(5,838)
Interest expense to related parties		0
Other expense, net		0
Loss on revaluation of warrant liabilities and embedded derivatives		(540)
Loss before income taxes		(21,056)
Income tax provision		0
Net loss		(21,056)
Less: net loss attributable to noncontrolling interests and redeemable noncontrolling interests		0
Net loss attributable to Class A and Class B common stockholders		(21,056)
Grid Pricing Escalation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loss on revaluation of warrant liabilities and embedded derivatives		540
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	99,559	90,926
Cost of revenue	72,489	88,772
Product | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		141,734
Cost of revenue		124,000
Product | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(48,171)
Cost of revenue		(34,980)
Product | Depreciation Of Energy Servers | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(37,496)
Product | Capitalized Stock-Based Compensation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		2,515
Installation
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	16,618	12,219
Cost of revenue	20,779	15,760
Installation | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		22,258
Cost of revenue		24,166
Installation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(11,195)
Cost of revenue		(8,406)
Installation | Depreciation Of Energy Servers | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(9,165)
Installation | Immaterial Misstatements | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		759
Service
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	25,147	23,467
Cost of revenue	30,970	27,921
Service | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		23,290
Cost of revenue		27,557
Service | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(574)
Cost of revenue		1,331
Service | Grid Pricing Escalation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		(94)
Service | Capitalized Stock-Based Compensation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		1,425
Electricity
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	15,375	20,389
Cost of revenue	$ 12,530	12,984
Electricity | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		13,425
Cost of revenue		9,229
Electricity | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		6,964
Cost of revenue		3,755
Electricity | Depreciation Of Energy Servers | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of revenue		3,718
Difference between Revenue Guidance in Effect before and after Topic 606
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(730)
Cost of revenue		(1,215)
Gross profit		485
Research and development		0
Sales and marketing		(92)
General and administrative		0
Total operating expenses		(92)
Loss from operations		577
Interest income		0
Interest expense		0
Interest expense to related parties		0
Other expense, net		0
Loss on revaluation of warrant liabilities and embedded derivatives		0
Loss before income taxes		577
Income tax provision		0
Net loss		577
Less: net loss attributable to noncontrolling interests and redeemable noncontrolling interests		0
Net loss attributable to Class A and Class B common stockholders		577
Difference between Revenue Guidance in Effect before and after Topic 606 | Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		(2,637)
Cost of revenue		(248)
Difference between Revenue Guidance in Effect before and after Topic 606 | Installation
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		1,156
Cost of revenue		0
Difference between Revenue Guidance in Effect before and after Topic 606 | Service
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		751
Cost of revenue		(967)
Difference between Revenue Guidance in Effect before and after Topic 606 | Electricity
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		0
Cost of revenue		$ 0
Energy Servers
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Estimated depreciable life			21 years