Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 33,779	$ 186,309
Short-term investments, including restricted investments of $430	197,734	95,383
Accounts receivable, net of allowances of $35	182	350
Prepaid expenses and other current assets	6,582	3,748
Total current assets	238,277	285,790
Property and equipment, net of accumulated depreciation and amortization of $82,576 and $80,535, respectively	44,526	46,417
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	157	205
Total assets	381,060	430,512
Current liabilities:
Accounts payable	4,579	6,042
Accrued liabilities	15,045	13,786
Current portion of deferred revenue	421	119
Current portion of long-term debt	1,510	1,443
Total current liabilities	21,555	21,390
Deferred revenue, net of current portion	13,910	14,212
Long-term debt	22,678	23,451
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	59,276	55,146
Total liabilities	136,164	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; 481,168 and 480,389 shares issued, respectively	481	480
Additional paid-in capital	1,090,485	1,087,033
Accumulated deficit	(845,420)	(789,621)
Accumulated other comprehensive gain (loss)	(20)	21
Treasury stock, at cost, 380 and 218 shares, respectively	(630)	(345)
Total equity	244,896	297,568
Total liabilities and equity	$ 381,060	$ 430,512