Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 186,309	$ 47,208
Short-term investments, including restricted investments of $430	95,383	163,903
Accounts receivable, net of allowances of $35	350	744
Prepaid expenses and other current assets	3,748	2,883
Total current assets	285,790	214,738
Property and equipment, net of accumulated depreciation and amortization of $80,535 and $80,323, respectively	46,417	53,427
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	205	619
Total assets	430,512	366,884
Current liabilities:
Accounts payable	6,042	3,159
Accrued liabilities	13,786	6,264
Current portion of deferred revenue	119	214
Current portion of long-term debt	1,443	1,138
Total current liabilities	21,390	10,775
Deferred revenue, net of current portion	14,212	14,212
Long-term debt	23,451	27,345
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	55,146	48,783
Total liabilities	132,944	119,860
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; 480,389 and 337,566 shares issued, respectively	480	338
Additional paid-in capital	1,087,033	920,324
Accumulated deficit	(789,621)	(673,406)
Accumulated other comprehensive gain	21	5
Treasury stock, at cost, 218 and 158 shares, respectively	(345)	(237)
Total equity	297,568	247,024
Total liabilities and equity	$ 430,512	$ 366,884