CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 282,187	$ 352,688
Marketable securities	15,138
Accounts receivable, net	15,475	8,397
Inventory	1,518	979
Other current assets	15,217	23,578
Total current assets	329,535	385,642
Restricted cash	11,316	11,308
Property and equipment, net	232,263	203,027
Intangible and other assets, net	3,025	3,139
Total assets	576,139	603,116
Current liabilities:
Accounts payable	14,865	10,819
Current portion of long-term debt	9,666	6,707
Accrued compensation and benefits	17,871	21,095
Accrued product development expenses	21,974	13,958
Other accrued expenses	20,696	11,514
Current portion of deferred revenue	7,976	8,075
Other current liabilities	22,628	17,830
Total current liabilities	115,676	89,998
Long-term debt (Note 8)	419,722	345,474
Other long-term liabilities	12,227	11,338
Deferred revenue	78,164	75,505
Total liabilities	$ 625,789	$ 522,315
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Preferred stock, $.01 par value; authorized 10,000,000 shares, none issued and outstanding
Common stock, $.001 par value; authorized, 450,000,000 shares in 2015 and 2014; issued and outstanding 189,189,890 shares in 2015 and 187,294,094 shares in 2014	$ 189	$ 187
Additional paid-in capital	1,331,678	1,299,394
Accumulated other comprehensive income (loss)	4,363	(4,185)
Accumulated deficit	(1,385,880)	(1,214,595)
Total stockholders' equity (deficit)	(49,650)	80,801
Total liabilities and stockholders' equity (deficit)	$ 576,139	$ 603,116