CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 273,047	$ 230,888
Marketable securities	5,497	11,407
Accounts receivable, net	14,106	15,686
Inventory, net	903	1,096
Other current assets	13,567	16,120
Total current assets	307,120	275,197
Restricted cash	10,874	11,308
Property and equipment, net	300,962	254,082
Intangible and other assets, net	5,411	6,105
Total assets	624,367	546,692
Current liabilities:
Accounts payable	8,111	17,013
Current portion of long-term debt	24,522	13,872
Accrued compensation and benefits	8,828	25,331
Accrued product development expenses	22,063	22,132
Other accrued expenses	21,292	22,849
Current portion of deferred revenue	10,550	6,763
Other current liabilities	5,297	24,324
Total current liabilities	100,663	132,284
Long-term debt	466,757	429,220
Other long-term liabilities	6,086	11,244
Deferred revenue	88,750	77,085
Total liabilities	662,256	649,833
Commitments
Stockholders’ equity (deficit):
Preferred stock, $.01 par value, authorized 10,000,000 shares, none issued and outstanding	0	0
Common stock, $.001 par value, authorized 450,000,000 shares; issued and outstanding 192,121,405 shares in 2016 and 189,662,148 shares in 2015	192	190
Additional paid-in capital	1,350,697	1,338,585
Accumulated other comprehensive (loss) income	912	3,835
Accumulated deficit	(1,389,690)	(1,445,751)
Total stockholders’ equity (deficit)	(37,889)	(103,141)
Total liabilities and stockholders’ equity (deficit)	$ 624,367	$ 546,692