Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 19,581	$ 30,423
Short-term investments, including restricted investments of $430	131,629	192,785
Accounts receivable, net of allowances of $35	895	1,378
Prepaid expenses and other current assets	7,257	6,349
Total current assets	159,362	230,935
Property and equipment, net of accumulated depreciation and amortization of $81,533 and $83,416, respectively	41,838	42,634
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	158	109
Total assets	299,458	371,778
Current liabilities:
Accounts payable	9,709	7,661
Accrued liabilities	11,529	8,922
Current portion of deferred revenue	685	128
Current portion of long-term debt	1,675	1,574
Total current liabilities	23,598	18,285
Deferred revenue, net of current portion	13,405	13,910
Long-term debt	20,609	21,877
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	37,391	32,283
Total liabilities	113,748	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; 514,275 and 512,375 shares issued, respectively	514	512
Additional paid-in capital	1,173,205	1,166,605
Accumulated deficit	(986,544)	(899,832)
Accumulated other comprehensive gain	38	23
Treasury stock, at cost, 814 and 380 shares, respectively	(1,503)	(630)
Total equity	185,710	266,678
Total liabilities and equity	$ 299,458	$ 371,778