CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net loss attributable to the Company	$ (596,155)	$ (83,743)	$ (85,608)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of long-lived assets	14,434	11,938	11,832
Amortization of intangible assets	1,135	698	693
Stock-based compensation	17,135	10,890	8,771
(Gain) loss on extinguishment of debt	(17,686)	518
Provision for bad debts and other assets	700	1,981	1,626
Amortization of debt issuance costs and discount on convertible senior notes	17,061	9,006	6,347
Provision for common stock warrants	425,047	6,513	10,190
Loss on disposal of leased assets		212
Fair value adjustment to contingent consideration	(1,160)
Impairment of long-lived assets	6,430
Change in fair value of common stock warrant liability		(79)	(4,286)
Deferred income tax benefit	(30,845)		(9,295)
Loss (benefit) on service contracts	33,125	(1,643)	5,345
Changes in operating assets and liabilities that provide (use) cash:
Accounts receivable	(15,701)	10,594	(14,666)
Inventory	(63,389)	(24,633)	19,193
Prepaid expenses and other assets	(18,401)	(8,110)	(4,654)
Accounts payable, accrued expenses, and other liabilities	51,880	17,234	(10,160)
Deferred revenue	20,914	(4,700)	6,322
Net cash used in operating activities	(155,476)	(53,324)	(58,350)
Investing activities
Purchases of property, plant and equipment	(22,526)	(5,683)	(5,142)
Purchase of intangible assets	(1,957)	(2,404)	(929)
Purchases of equipment related to PPA and equipment related to fuel delivered to customers	(25,738)	(6,532)	(13,501)
Net cash paid for acquisitions	(45,113)
Proceeds from sale of leased assets		375
Net cash used in investing activities	(95,334)	(14,244)	(19,572)
Financing activities
Proceeds from issuance of preferred stock and warrants, net of transaction costs		14,089	30,934
Proceeds from public offerings, net of transaction costs	1,271,714	158,343	7,195
Proceeds from exercise of stock options	32,023	1,217	138
Payments for redemption of preferred stock		(4,040)
Proceeds from issuance of convertible senior notes, net	205,098	39,052	95,856
Repurchase of convertible senior notes	(90,238)
Purchase of capped calls and common stock forward	(16,253)		(43,500)
Proceeds from borrowing of long-term debt, net of transaction costs		119,186
Proceeds from termination of capped calls	24,158
Principal payments on long-term debt	(48,020)	(25,345)	(16,190)
Proceeds from finance obligations	65,259	83,668	76,175
Proceeds from long-term debt, net	99,000	119,186
Repayments of finance obligations	(27,212)	(59,196)	(30,531)
Net cash provided by financing activities	1,515,529	326,974	120,077
Effect of exchange rate changes on cash	65	(59)	(57)
Increase in cash, cash equivalents and restricted cash	1,264,784	259,347	42,098
Cash, cash equivalents, and restricted cash beginning of period	369,500	110,153	68,055
Cash, cash equivalents, and restricted cash end of period	1,634,284	369,500	110,153
Supplemental disclosure of cash flow information
Cash paid for interest	28,942	19,180	13,057
Summary of non-cash activity
Recognition of right of use assets	55,651	52,924	41,679
Net tangible assets acquired in a business combination	8,751
Intangible assets acquired in a business combination	32,268
Conversion of convertible notes to common stock	62,553
Net transfers between inventory and long-lived assets			$ 18,175
Conversion of preferred stock to common stock	$ 1,179	$ 28,392