Consolidated Balance Sheets - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 8,962,000	$ 5,711,000
Accounts receivable, net		12,000
Prepaid expenses and other current assets	282,000	590,000
Total current assets	9,244,000	6,313,000
Property and equipment, net	909,000	1,072,000
In process research and development	4,661,000	10,461,000
Acquired patents, net	292,000	307,000
Total assets	15,106,000	18,153,000
Current liabilities
Accounts payable and accrued expenses	1,856,000	1,617,000
Deferred revenue	58,000
Accrued compensation	1,072,000	895,000
Dividends payable	38,000	38,000
Insurance premium liability	81,000	185,000
Note payable	606,000	803,000
Total current liabilities	3,711,000	3,538,000
Derivative liabilities	387,000	2,443,000
Deferred tax liability	1,147,000	2,449,000
Total liabilities	5,245,000	8,430,000
Series B redeemable convertible preferred stock
$0.01 par value; no shares authorized at June 30, 2017 and December 31, 2016; no shares issued and outstanding at June 30, 2017 and December 31, 2016
Stockholders' equity
Common stock, $0.01 par value; 67,000,000 shares authorized at June 30, 2017 and December 31, 2016; 8,549,152 and 1,648,751 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	85,000	16,000
Additional paid-in capital	400,851,000	391,067,000
Accumulated deficit	(391,075,000)	(381,360,000)
Total stockholders' equity	9,861,000	9,723,000
Total liabilities, Series B redeemable convertible preferred stock and stockholders' equity	$ 15,106,000	$ 18,153,000