Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 27,725	$ 37,499
Short-term investments, including restricted investments of $430	51,319	91,629
Accounts receivable, net of allowances of $35	281	790
Prepaid expenses and other current assets	7,342	4,636
Total current assets	86,667	134,554
Property and equipment, net of accumulated depreciation and amortization of $76,945 and $81,945, respectively	39,177	41,362
Goodwill	44,543	44,543
Other intangible assets	53,557	53,557
Other assets	120	144
Total assets	224,064	274,160
Current liabilities:
Accounts payable	8,350	9,715
Accrued liabilities	10,886	7,674
Current portion of deferred revenue	877	195
Current portion of long-term debt	1,783	1,710
Total current liabilities	21,896	19,294
Deferred revenue, net of current portion	12,679	13,405
Long-term debt	19,255	20,167
Deferred tax liabilities	18,745	18,745
Other long-term liabilities	34,821	32,386
Total liabilities	107,396	103,997
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; 515,947 and 514,349 shares issued, respectively	516	514
Additional paid-in capital	1,179,358	1,175,108
Accumulated deficit	(1,060,821)	(1,003,958)
Accumulated other comprehensive gain	5	2
Treasury stock, at cost, 1,281 and 814 shares, respectively	(2,390)	(1,503)
Total equity	116,668	170,163
Total liabilities and equity	$ 224,064	$ 274,160