Consolidated Balance Sheets - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 6,173,000	$ 9,370,000
Accounts receivable	14,000	125,000
Prepaid expenses and other current assets	566,000	521,000
Total current assets	6,753,000	10,016,000
Property and equipment, net	1,170,000	1,131,000
In process research and development	12,446,000	12,446,000
Acquired patents, net	330,000	338,000
Goodwill	7,562,000	7,562,000
Total assets	28,261,000	31,493,000
Current liabilities
Accounts payable, accrued expenses and other	2,003,000	1,464,000
Deferred revenue	142,000	245,000
Accrued severance	138,000	308,000
Dividends payable	368,000	368,000
Total current liabilities	2,651,000	2,385,000
Series B preferred stock derivative liability	91,000	1,493,000
Warrant liability	2,000	6,000
Deferred tax liability	3,005,000	3,005,000
Total liabilities	5,749,000	6,889,000
Series B redeemable convertible preferred stock
$0.01 par value, 9,357,935 shares authorized at March 31, 2016 and December 31, 2015, 7,527,853 shares issued and outstanding at March 31, 2016 and December 31, 2015 (liquidation preference of $13,706,000 and $13,383,000 at March 31, 2016 and December 31, 2015, respectively)	13,615,000	11,890,000
Stockholders' equity
Common stock, $0.01 par value, 670,000,000 shares authorized at March 31, 2016 and December 31, 2015, 5,883,503 shares issued and outstanding at March 31, 2016 and December 31, 2015	59,000	59,000
Additional paid-in capital	374,472,000	375,177,000
Accumulated deficit	(365,634,000)	(362,522,000)
Total stockholders' equity (deficit)	8,897,000	12,714,000
Total liabilities, Series B redeemable convertible preferred stock and stockholders' equity	$ 28,261,000	$ 31,493,000