Consolidated Balance Sheets - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 14,351,000	$ 6,581,000
Accounts receivable		100,000
Prepaid expenses and other current assets	512,000	339,000
Total current assets	14,863,000	7,020,000
Property and equipment, net	1,147,000	1,220,000
In process research and development	12,446,000	12,446,000
Acquired patents, net	354,000	369,000
Goodwill	7,562,000	7,562,000
Total assets	36,372,000	28,617,000
Current liabilities
Accounts payable, accrued expenses and other	1,365,000	1,167,000
Deferred revenue	350,000	244,000
Accrued severance	321,000	457,000
Total current liabilities	2,167,000	1,868,000
Preferred B stock derivative liability	10,032,000	12,320,000
Warrant liability	3,984,000	5,826,000
Accrued severance		98,000
Deferred tax liability	3,078,000	3,078,000
Dividends payable	131,000
Total liabilities	19,261,000	23,190,000
Series B redeemable convertible preferred stock
Preferred stock, $0.01 par value, 10,000,000 shares authorized, 8,290,353 shares issued and outstanding at June 30, 2015 and 8,671,040 shares issued and outstanding at December 31, 2014 (liquidation preference of $14,053,000 and $14,042,000 at June 30, 2015 and December 31, 2014, respectively)	4,023,000	1,990,000
Stockholders' equity (deficit)
Common stock, $0.01 par value, 445,000,000 shares authorized, 5,706,883 shares issued and outstanding at June 30, 2015 and 3,983,182 shares issued and outstanding December 31, 2014	57,000	40,000
Additional paid-in capital	378,761,000	365,403,000
Accumulated deficit	(365,730,000)	(362,006,000)
Total stockholders' equity (deficit)	13,088,000	3,437,000
Total liabilities, Series B redeemable convertible preferred stock and stockholders' equity	$ 36,372,000	$ 28,617,000