CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 58,838	$ 70,105
Accounts receivable	6,937	1,516
Other current assets	1,692	919
Total current assets	67,467	72,540
Auction rate securities	3,240	3,332
Fixed assets, at cost, net of accumulated depreciation and amortization	3,399	4,038
Deferred tax assets - long term	2,052	0
Other assets	150	200
Total assets	76,308	80,110
Current liabilities:
Accounts payable and accrued expenses	5,640	6,331
Deferred tax liability - current	2,069	0
Deferred revenue - current	838	204
Other current liabilities	115	115
Total current liabilities	8,662	6,650
Deferred revenue - long term	0	162
Other liabilities	1,078	1,497
Total liabilities	9,740	8,309
Stockholders' equity:
Preferred stock, $.001 par value; 20,000,000 shares authorized; issued and outstanding - none	0	0
Common stock, $.0013 par value; 80,000,000 shares authorized; issued - 46,765,472 in 2012 and 34,046,409 in 2011	61	44
Additional paid-in capital	493,613	463,440
Accumulated deficit	(424,105)	(388,674)
Accumulated other comprehensive loss	(260)	(268)
Treasury stock, at cost (200,000 shares in 2012 and 2011)	(2,741)	(2,741)
Total stockholders' equity	66,568	71,801
Total liabilities and stockholders' equity	$ 76,308	$ 80,110