Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,349,066	$ 1,312,404
Restricted cash	62,397	64,041
Available-for-sale securities, at fair value (amortized cost $405,168 and allowance for credit losses of $0 at March 31, 2021)	405,260
Accounts receivable	42,632	43,041
Inventory	187,732	139,386
Prepaid expenses and other current assets	49,097	44,324
Total current assets	5,096,184	1,603,196
Restricted cash	281,665	257,839
Property, plant, and equipment, net	82,823	74,549
Right of use assets related to finance leases, net	11,270	5,724
Right of use assets related to operating leases, net	124,503	117,016
Equipment related to power purchase agreements and fuel delivered to customers, net	74,214	75,807
Goodwill	71,964	72,387
Intangible assets, net	38,393	39,251
Other assets	5,225	5,513
Total assets	5,786,241	2,251,282
Current liabilities:
Accounts payable	47,168	50,198
Accrued expenses	28,595	46,083
Deferred revenue	16,948	23,275
Operating lease liabilities	18,778	14,314
Finance lease liabilities	1,794	903
Finance obligations	32,144	32,717
Current portion of long-term debt	21,389	25,389
Other current liabilities	24,997	29,487
Total current liabilities	191,813	222,366
Deferred revenue	40,611	32,944
Operating lease liabilities	103,533	99,624
Finance lease liabilities	8,507	4,493
Finance obligations	150,647	148,836
Convertible senior notes, net	191,768	85,640
Long-term debt	139,870	150,013
Other liabilities	40,429	40,447
Total liabilities	867,178	784,363
Stockholders' equity:
Common stock, $0.01 par value per share; 750,000,000 shares authorized; Issued (including shares in treasury): 582,312,020 at March 31, 2021 and 473,977,469 at December 31, 2020	5,823	4,740
Additional paid-in capital	6,949,938	3,446,650
Accumulated other comprehensive income	1,420	2,451
Accumulated deficit	(1,997,684)	(1,946,488)
Less common stock in treasury: 15,926,068 at both March 31, 2021 and December 31, 2020	(40,434)	(40,434)
Total stockholders' equity	4,919,063	1,466,919
Total liabilities and stockholders' equity	$ 5,786,241	$ 2,251,282