Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 30,423	$ 186,309
Short-term investments, including restricted investments of $430	192,785	95,383
Accounts receivable, net of allowances of $35	1,378	350
Prepaid expenses and other current assets	6,349	3,748
Total current assets	230,935	285,790
Property and equipment, net of accumulated depreciation and amortization of $83,416 and $80,535, respectively	42,634	46,417
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	109	205
Total assets	371,778	430,512
Current liabilities:
Accounts payable	7,661	6,042
Accrued liabilities	8,922	13,786
Current portion of deferred revenue	128	119
Current portion of long-term debt	1,574	1,443
Total current liabilities	18,285	21,390
Deferred revenue, net of current portion	13,910	14,212
Long-term debt	21,877	23,451
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	32,283	55,146
Total liabilities	105,100	132,944
Commitments and contingencies
Equity:
Preferred stock, $.01 par value; 5,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $.001 par value; 900,000 shares authorized; 512,375 and 480,389 shares issued, respectively	512	480
Additional paid-in capital	1,166,605	1,087,033
Accumulated deficit	(899,832)	(789,621)
Accumulated other comprehensive gain	23	21
Treasury stock, at cost, 380 and 218 shares, respectively	(630)	(345)
Total equity	266,678	297,568
Total liabilities and equity	$ 371,778	$ 430,512