Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 23,254	$ 30,423
Short-term investments, including restricted investments of $430	152,124	192,785
Accounts receivable, net of allowances of $35	1,014	1,378
Prepaid expenses and other current assets	6,684	6,349
Total current assets	183,076	230,935
Property and equipment, net of accumulated depreciation and amortization of $81,034 and $83,416, respectively	42,152	42,634
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	65	109
Total assets	323,393	371,778
Current liabilities:
Accounts payable	6,281	7,661
Accrued liabilities	11,321	8,922
Current portion of deferred revenue	623	128
Current portion of long-term debt	22,678	1,574
Total current liabilities	40,903	18,285
Deferred revenue, net of current portion	13,405	13,910
Long-term debt	0	21,877
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	35,256	32,283
Total liabilities	108,309	105,100
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; 513,972 and 512,375 shares issued, respectively	514	512
Additional paid-in capital	1,170,928	1,166,605
Accumulated deficit	(954,886)	(899,832)
Accumulated other comprehensive gain	31	23
Treasury stock, at cost, 814 and 380 shares, respectively	(1,503)	(630)
Total equity	215,084	266,678
Total liabilities and equity	$ 323,393	$ 371,778