CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 2,481,269	$ 1,312,404
Restricted cash	118,633	64,041
Available-for-sale securities, at fair value (amortized cost $1,242,993 and allowance for credit losses of $0 at December 31, 2021)	1,240,265
Equity securities	147,995
Accounts receivable	92,675	43,041
Inventory	269,163	139,386
Contract assets	38,637	15,351
Prepaid expenses and other current assets	59,888	28,973
Total current assets	4,448,525	1,603,196
Restricted cash	532,292	257,839
Property, plant, and equipment, net	255,623	74,549
Right of use assets related to finance leases, net	32,494	5,724
Right of use assets related to operating leases, net	212,537	117,016
Equipment related to power purchase agreements and fuel delivered to customers, net	72,902	75,807
Contract assets	120	2,838
Goodwill	220,436	72,387
Intangible assets, net	158,208	39,251
Investments in non-consolidated entities and non-marketable equity securities	12,892	1,000
Other assets	4,047	1,675
Total assets	5,950,076	2,251,282
Current liabilities:
Accounts payable	92,307	50,198
Accrued expenses	79,237	46,083
Deferred revenue and other contract liabilities.	116,377	43,341
Operating lease liabilities	30,822	14,314
Finance lease liabilities	4,718	903
Finance obligations	42,040	32,717
Current portion of long-term debt	15,252	25,389
Loss accruals for service contracts and other current liabilities	39,800	9,421
Total current liabilities	420,553	222,366
Deferred revenue and other contract liabilities	66,713	32,944
Operating lease liabilities	175,635	99,624
Finance lease liabilities	24,611	4,493
Finance obligations	211,644	148,836
Convertible senior notes, net	192,633	85,640
Long-term debt	112,794	150,013
Loss accruals for service contracts and other liabilities	139,797	40,447
Total liabilities	1,344,380	784,363
Stockholders' equity:
Common stock, $0.01 par value per share; 1,500,000,000 shares authorized; Issued (including shares in treasury): 594,729,610 at December 31, 2021 and 473,977,469 at December 31, 2020	5,947	4,740
Additional paid-in capital	7,070,710	3,446,650
Accumulated other comprehensive (loss) income	(1,532)	2,451
Accumulated deficit	(2,396,903)	(1,946,488)
Less common stock in treasury: 17,074,710 at December 31, 2021 and 15,926,068 at December 31, 2020	(72,526)	(40,434)
Total stockholders' equity	4,605,696	1,466,919
Total liabilities and stockholders' equity	$ 5,950,076	$ 2,251,282