Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 170,966	$ 228,659
Marketable securities	1,736,030	1,686,771
Accounts receivable, net	15,086	12,638
Other Assets, Current	22,573	39,856
Total current assets	1,944,655	1,967,924
Property and equipment, net	277,942	295,570
Goodwill	52,527	52,527
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	13,205	17,361
Other long-term assets	25,844	24,355
Total long-term assets	369,518	389,813
Total assets	2,314,173	2,357,737
Current liabilities:
Accounts payable and accrued liabilities	144,361	188,171
Deferred revenues	699,456	680,483
Convertible Debentures, including contingent interest derivative	632,308	634,326
Total current liabilities	1,476,125	1,502,980
Long-term deferred revenues	288,232	280,859
Senior Notes	1,236,272	1,235,354
Deferred Tax Liabilities, Net	326,112	294,194
Other long-term liabilities	114,762	114,797
Total long-term liabilities	1,965,378	1,925,204
Total liabilities	3,441,503	3,428,184
Commitments and contingencies
Stockholders' deficit:
Preferred stock-par value $.001 per share; Authorized shares: 5,000; Issued and outstanding shares: none	0	0
Common stock-par value $.001 per share; Authorized shares: 1,000,000; Issued shares: 323,941 at June 30, 2016 and 322,990 at December 31, 2015; Outstanding shares: 107,180 at June 30, 2016 and 110,072 at December 31, 2015	324	323
Additional paid-in capital	17,279,468	17,558,822
Accumulated deficit	(18,404,933)	(18,625,599)
Accumulated other comprehensive loss	(2,189)	(3,993)
Total stockholders' deficit	(1,127,330)	(1,070,447)
Total liabilities and stockholders' deficit	$ 2,314,173	$ 2,357,737

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.