Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,474,637	$ 835,080
Short-term investments	341,467	289,668
Accounts receivable	121,827	90,879
Inventory	220,118	171,379
Other current assets	164,624	81,907
Total current assets	2,322,673	1,468,913
Property and equipment, net	171,715	129,620
Intangible assets, net	13,344	12,497
Right of use assets	71,085	37,933
Other non-current assets	201,847	173,859
Total assets	2,780,664	1,822,822
Current liabilities:
Accounts payable	74,528	68,094
Accrued expenses	199,063	185,527
Deferred revenue, current portion	89,244	3,303
Other current liabilities	15,553	7,843
Total current liabilities	378,388	264,767
Long-term debt	700,470	681,900
Lease liabilities	68,229	47,720
Deferred revenue, net of current portion	685,982
Contingent consideration	50,500	5,200
Other non-current liabilities	5,048	5,048
Total liabilities	1,888,617	1,004,635
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $0.0001 par value, 3,333,333 shares authorized; none issued and outstanding
Common stock, $0.0001 par value, 198,000,000 shares authorized; 78,789,760 and 75,184,863 issued and outstanding at September 30, 2020 and December 31, 2019, respectively	8	8
Additional paid-in capital	3,550,857	3,112,130
Accumulated other comprehensive (loss) income, net of tax	(6)	50
Accumulated deficit	(2,658,812)	(2,294,001)
Total stockholders’ equity	892,047	818,187
Total liabilities and stockholders’ equity	$ 2,780,664	$ 1,822,822