Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 582,753	$ 849,461
Short-term investments	404,252	114,278
Accounts receivable, net of allowance of $22,774 and $9,312 at December 31, 2019 and 2018, respectively	99,720	50,603
Inventories	61,692	46,164
Prepaid expenses and other current assets	228,721	195,430
Total current assets	1,377,138	1,255,936
Operating lease right-of-use assets	763,400
Property and equipment, net	624,544	606,977
Goodwill and intangible assets, net	18,809	2,585
Long-term investments	155,690	6,526
Other noncurrent assets	13,467	18,826
Total assets	2,953,048	1,890,850
Current liabilities
Accounts payable	908,097	650,174
Accrued expenses	298,918	212,997
Unearned revenue	167,641	148,057
Other current liabilities	236,863	127,995
Total current liabilities	1,611,519	1,139,223
Long-term debt	1,456,195	738,904
Operating lease liabilities	822,602
Lease financing obligations, net of current portion	0
Lease financing obligations, net of current portion		183,056
Other liabilities	6,940	160,388
Total liabilities	3,897,256	2,221,571
Commitments and contingencies (Note 8)
Convertible preferred stock, $0.001 par value per share: 10,000,000 shares authorized and none issued at December 31, 2019 and 2018	0	0
Stockholders’ deficit:
Additional paid-in capital	1,122,548	753,657
Accumulated deficit	(2,065,423)	(1,082,689)
Accumulated other comprehensive (loss)	(1,427)	(1,780)
Total stockholders' deficit	(944,208)	(330,721)
Total liabilities and stockholders' deficit	2,953,048	1,890,850
Class A common stock
Stockholders’ deficit:
Common stock	67	63
Class B common stock
Stockholders’ deficit:
Common stock	$ 27	$ 28