Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 37,499	$ 30,423
Short-term investments, including restricted investments of $430	91,629	192,785
Accounts receivable, net of allowances of $35	790	1,378
Prepaid expenses and other current assets	4,636	6,349
Total current assets	134,554	230,935
Property and equipment, net of accumulated depreciation and amortization of $81,945 and $83,416, respectively	41,362	42,634
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	144	109
Total assets	274,160	371,778
Current liabilities:
Accounts payable	9,715	7,661
Accrued liabilities	7,674	8,922
Current portion of deferred revenue	195	128
Current portion of long-term debt	1,710	1,574
Total current liabilities	19,294	18,285
Deferred revenue, net of current portion	13,405	13,910
Long-term debt	20,167	21,877
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	32,386	32,283
Total liabilities	103,997	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; 514,349 and 512,375 shares issued, respectively	514	512
Additional paid-in capital	1,175,108	1,166,605
Accumulated deficit	(1,003,958)	(899,832)
Accumulated other comprehensive gain	2	23
Treasury stock, at cost, 814 and 380 shares, respectively	(1,503)	(630)
Total equity	170,163	266,678
Total liabilities and equity	$ 274,160	$ 371,778