CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 108,430	$ 119,302
Accounts receivable, net	152	109
Other current assets	3,006	2,515
Total current assets	111,588	121,926
Fixed assets, at cost, net of accumulated depreciation and amortization	2,473	2,552
Intangible assets, net (Note 5)	28,700	28,700
Goodwill	7,702	7,702
Other assets	157	157
Total assets	150,620	161,037
Current liabilities:
Accounts payable and accrued expenses	5,301	6,570
Other current liabilities	115	115
Total current liabilities	5,416	6,685
Contingent consideration liability	17,500	17,200
Deferred tax liability - long term	11,332	11,332
Other liabilities	899	911
Total liabilities	35,147	36,128
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $.001 par value; 20,000,000 shares authorized; issued and outstanding - none	0	0
Common stock, $.0013 par value; 160,000,000 shares authorized; issued - 69,844,949 in 2015 and 69,832,949 in 2014	91	91
Additional paid-in capital	590,644	589,826
Accumulated deficit	(472,521)	(462,267)
Treasury stock, at cost (200,000 shares in 2015 and 2014)	(2,741)	(2,741)
Total stockholders' equity	115,473	124,909
Total liabilities and stockholders' equity	$ 150,620	$ 161,037