CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,515,116	$ 553,398
Marketable securities	0	157,649
Restricted cash	11,490	93,880
Accounts receivable	454,993	262,012
Prepaid expenses and other current assets	173,520	181,264
Total current assets	2,155,119	1,248,203
Property and equipment, net	228,696	179,954
Intangible assets, net	4,770	5,725
Goodwill	131,479	135,379
Other non-current assets	56,689	13,218
Total assets	2,576,753	1,582,479
Current liabilities:
Accounts payable	127,050	54,332
Accrued expenses	673,731	137,390
Deferred revenue	1,422,944	273,228
Current portion of finance lease liabilities	130,533	105,862
Other current liabilities	36,061	8,860
Total current liabilities	2,390,319	579,672
Deferred revenue	172,528	0
Convertible notes payable	323,458	322,035
Non-current finance lease liabilities	0	40,083
Other non-current liabilities	42,121	13,480
Total liabilities	2,928,426	955,270
Commitments and contingencies
Preferred stock, $0.01 par value, 2,000,000 shares authorized at December 31, 2021 and 2020; no shares issued and outstanding at December 31, 2021 and 2020	0	0
Stockholders’ equity (deficit):
Common stock, $0.01 par value, 600,000,000 shares authorized at December 31, 2021 and 2020; and 76,433,151 shares issued and 75,841,171 shares outstanding at December 31, 2021 and 71,350,365 shares issued and 70,953,739 shares outstanding at December 31, 2020	764	714
Additional paid-in capital	3,351,967	2,535,476
Accumulated deficit	(3,617,950)	(1,874,199)
Treasury stock, 591,980 shares, cost basis at December 31, 2021 and 396,626 shares, cost basis at December 31, 2020	(85,101)	(41,806)
Accumulated other comprehensive income (loss)	(1,353)	7,024
Total stockholders’ equity (deficit)	(351,673)	627,209
Total liabilities and stockholders’ equity (deficit)	$ 2,576,753	$ 1,582,479