CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	[1]
Current assets:
Cash and cash equivalents	$ 1,669,968	$ 1,513,008
Marketable securities-available-for-sale (amortized cost $292,278; allowance for credit losses $0)	292,425	288,369
Accounts receivable	397,357	481,994
Inventory	16,700	16,425
Prepaid expenses and other current assets	73,519	60,098
Total current assets	2,449,969	2,359,894
Restricted cash and investments	1,643	1,757
Long term investments	202,174	222,301
Inventory	23,679	19,548
Property and equipment, net	594,670	559,625
Finance lease right-of-use assets, net	27,987	28,451
Other intangible assets, net	166,907	172,291
Goodwill	155,593	155,593
Other assets, net	38,814	41,458
Total assets	3,661,436	3,560,918
Current liabilities:
Accounts payable	85,058	98,767
Accrued compensation	75,718	113,340
Accrued and other current liabilities	420,882	378,404
Finance lease liabilities	2,317	2,284
Acquisition-related contingent consideration	39,906	38,400
Total current liabilities	623,881	631,195
Acquisition-related contingent consideration	223,094	227,600
Finance lease liabilities	32,154	32,573
Other liabilities	54,463	58,282
Total liabilities	933,592	949,650
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; none issued or outstanding as of March 31, 2021 and December 31, 2020
Common stock, $0.001 par value; 400,000,000 shares authorized; 219,880,198 and 219,489,329 shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	220	219
Additional paid-in capital	4,420,902	4,352,864
Accumulated other comprehensive loss	(20,358)	(15,360)
Accumulated deficit	(1,672,920)	(1,726,455)
Total stockholders' equity	2,727,844	2,611,268
Total liabilities and stockholders' equity	$ 3,661,436	$ 3,560,918

[1] The condensed consolidated balance sheet at December 31, 2020 has been derived from the audited consolidated financial statements at that date.