Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 28,827	$ 24,074
Investments in marketable securities	119,940	127,601
Prepaid expenses and other current assets	2,484	2,902
Total current assets	151,251	154,577
Available-for-sale Securities, Noncurrent	2,804	17,464
Property and equipment, less accumulated depreciation and amortization of $12,028 and $11,520 at March 31, 2015 and December 31, 2014 respectively	3,056	2,811
In-process research & development	23,000	23,000
Goodwill	11,613	11,613
Other non-current assets	892	502
Total Assets	192,616	209,967
Current liabilities:
Accounts payable and accrued expenses	15,833	16,345
Current portion of secured loan	5,189	3,840
Total current liabilities	21,022	20,185
Deferred reimbursements	36,620	36,620
Secured loan, less current portion	9,208	10,510
Contingent consideration payable	11,700	10,700
Deferred tax liability	9,186	9,186
Other non-current liability	870	588
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value, 125,000,000 shares authorized, 96,375,015 shares issued and outstanding at March 31, 2015 95,556,277 shares issued and outstanding at December 31, 2014	1,024	1,015
Additional paid-in capital	574,757	568,743
Accumulated other comprehensive income	(35)	(132)
Accumulated Deficit	(471,736)	(447,448)
Total stockholders' equity	104,010	122,178
Total Liabilities and Stockholders' Equity	$ 192,616	$ 209,967