Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 137,266	$ 37,499
Short-term investments, including restricted investments of $430	202,073	91,629
Accounts receivable, net of allowances of $35	1,035	790
Assets held for sale	23,849	0
Prepaid expenses and other current assets	4,764	4,636
Total current assets	368,987	134,554
Property and equipment, net of accumulated depreciation and amortization of $36,274 and $81,945, respectively	1,080	41,362
Goodwill	44,543	44,543
Other intangible assets	53,357	53,557
Other assets	3,409	144
Total assets	471,376	274,160
Current liabilities:
Accounts payable	13,064	9,715
Accrued liabilities	10,120	7,674
Current portion of deferred revenue	1,618	195
Current portion of long-term debt	20,167	1,710
Total current liabilities	44,969	19,294
Deferred revenue, net of current portion	12,679	13,405
Long-term debt	87,500	20,167
Deferred tax liabilities	18,675	18,745
Other long-term liabilities	23,535	32,386
Total liabilities	187,358	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; 725,641 and 514,349 shares issued, respectively	726	514
Additional paid-in capital	1,389,997	1,175,108
Accumulated deficit	(1,104,252)	(1,003,958)
Accumulated other comprehensive gain (loss)	(63)	2
Treasury stock, at cost, 1,281 and 814 shares, respectively	(2,390)	(1,503)
Total equity	284,018	170,163
Total liabilities and equity	$ 471,376	$ 274,160