Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,371,962	$ 1,312,404
Restricted cash	90,688	64,041
Available-for-sale securities, at fair value (amortized cost $756,841 and allowance for credit losses of $0 at September 30, 2021)	752,766
Equity securities	147,649
Accounts receivable	132,370	43,041
Inventory	229,814	139,386
Prepaid expenses and other current assets	62,746	44,324
Total current assets	4,787,995	1,603,196
Restricted cash	390,542	257,839
Property, plant, and equipment, net	169,586	74,549
Right of use assets related to finance leases, net	22,039	5,724
Right of use assets related to operating leases, net	167,907	117,016
Equipment related to power purchase agreements and fuel delivered to customers, net	78,711	75,807
Goodwill	71,856	72,387
Intangible assets, net	37,644	39,251
Other assets	13,820	5,513
Total assets	5,740,100	2,251,282
Current liabilities:
Accounts payable	68,378	50,198
Accrued expenses	52,645	46,083
Deferred revenue	35,463	23,275
Operating lease liabilities	23,284	14,314
Finance lease liabilities	2,758	903
Finance obligations	35,595	32,717
Current portion of long-term debt	23,491	25,389
Other current liabilities	28,329	29,487
Total current liabilities	269,943	222,366
Deferred revenue	63,402	32,944
Operating lease liabilities	139,400	99,624
Finance lease liabilities	17,027	4,493
Finance obligations	172,242	148,836
Convertible senior notes, net	192,320	85,640
Long-term debt	123,764	150,013
Other liabilities	55,113	40,447
Total liabilities	1,033,211	784,363
Stockholders' equity:
Common stock, $0.01 par value per share; 1,500,000,000 shares authorized; Issued (including shares in treasury): 593,077,995 at September 30, 2021 and 473,977,469 at December 31, 2020	5,930	4,740
Additional paid-in capital	6,978,454	3,446,650
Accumulated other comprehensive (loss) gain	(2,338)	2,451
Accumulated deficit	(2,203,989)	(1,946,488)
Less common stock in treasury: 17,032,648 at September 30, 2021 and 15,926,068 at December 31, 2020	(71,168)	(40,434)
Total stockholders' equity	4,706,889	1,466,919
Total liabilities and stockholders' equity	$ 5,740,100	$ 2,251,282