Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 29,010	$ 186,309
Short-term investments, including restricted investments of $430	224,646	95,383
Accounts receivable, net of allowances of $35	186	350
Prepaid expenses and other current assets	5,143	3,748
Total current assets	258,985	285,790
Property and equipment, net of accumulated depreciation and amortization of $81,654 and $80,535, respectively	45,526	46,417
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	181	205
Total assets	402,792	430,512
Current liabilities:
Accounts payable	5,324	6,042
Accrued liabilities	13,710	13,786
Current portion of deferred revenue	421	119
Current portion of long-term debt	1,478	1,443
Total current liabilities	20,933	21,390
Deferred revenue, net of current portion	13,910	14,212
Long-term debt	23,063	23,451
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	57,170	55,146
Total liabilities	133,821	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; 480,942 and 480,389 shares issued, respectively	481	480
Additional paid-in capital	1,088,666	1,087,033
Accumulated deficit	(819,489)	(789,621)
Accumulated other comprehensive gain (loss)	(57)	21
Treasury stock, at cost, 380 and 218 shares, respectively	(630)	(345)
Total equity	268,971	297,568
Total liabilities and equity	$ 402,792	$ 430,512