Consolidated Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 9,370,000	$ 6,581,000
Accounts receivable	125,000	100,000
Prepaid expenses and other current assets	521,000	339,000
Total current assets	10,016,000	7,020,000
Property and equipment, net	1,131,000	1,220,000
In process research and development	12,446,000	12,446,000
Acquired patents, net	338,000	369,000
Goodwill	7,562,000	7,562,000
Total assets	31,493,000	28,617,000
Current liabilities
Accounts payable, accrued expenses and other	1,464,000	1,167,000
Deferred revenue	245,000	244,000
Accrued severance	308,000	457,000
Dividends payable	368,000
Total current liabilities	2,385,000	1,868,000
Series B preferred stock derivative liability	1,493,000	12,320,000
Warrant liability	6,000	5,826,000
Accrued severance		98,000
Deferred tax liability	3,005,000	3,078,000
Total liabilities	6,889,000	23,190,000
Series B redeemable convertible preferred stock
$0.01 par value, 10,000,000 shares authorized, 7,527,853 shares issued and outstanding at December 31, 2015 and 8,671,040 shares issued and outstanding at December 31, 2014 (liquidation preference of $13,383,000 and $14,042,000 at December 31, 2015 and December 31, 2014, respectively)	11,890,000	1,990,000
Stockholders' equity
Common stock, $0.01 par value, 670,000,000 shares authorized, 5,883,503 shares issued and outstanding at December 31, 2015 and 3,983,182 shares issued and outstanding at December 31, 2014	59,000	40,000
Additional paid-in capital	375,177,000	365,403,000
Accumulated deficit	(362,522,000)	(362,006,000)
Total stockholders' equity (deficit)	12,714,000	3,437,000
Total liabilities, Series B redeemable convertible preferred stock and stockholders' equity	$ 31,493,000	$ 28,617,000