Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,502,648	$ 835,080
Short-term investments	435,923	289,668
Accounts receivable	101,340	90,879
Inventory	231,961	171,379
Other current assets	213,324	81,907
Total current assets	2,485,196	1,468,913
Property and equipment, net	190,430	129,620
Intangible assets, net	13,628	12,497
Right of use assets	91,761	37,933
Other non-current assets	203,703	173,859
Total assets	2,984,718	1,822,822
Current liabilities:
Accounts payable	111,090	68,094
Accrued expenses	193,553	185,527
Deferred revenue, current portion	89,244	3,303
Other current liabilities	22,139	7,843
Total current liabilities	416,026	264,767
Long-term debt	992,493	681,900
Lease liabilities, net of current portion	80,367	47,720
Deferred revenue, net of current portion	663,488
Contingent consideration	50,800	5,200
Other non-current liabilities	19,785	5,048
Total liabilities	2,222,959	1,004,635
Commitments and contingencies (Note 21)
Stockholders’ equity:
Preferred stock, $.0001 par value, 3,333,333 shares authorized; none issued and outstanding
Common stock, $.0001 par value, 198,000,000 shares authorized; 79,374,247 and 75,184,863 issued and outstanding at December 31, 2020 and 2019, respectively	8	8
Additional paid-in capital	3,609,877	3,112,130
Accumulated other comprehensive income, net of tax	3	50
Accumulated deficit	(2,848,129)	(2,294,001)
Total stockholders’ equity	761,759	818,187
Total liabilities and stockholders’ equity	$ 2,984,718	$ 1,822,822