Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 24,490	$ 23,052
Investment securities	10,582	17,929
Prepaid expenses and other current assets	746	1,271
Total current assets	35,818	42,252
Property and equipment, net	171	226
In-process research and development	8,549	8,549
Goodwill	3,007	3,007
Other assets	131	183
Total assets	47,676	54,217
Current liabilities:
Accounts payable	2,300	2,600
Accrued liabilities	9,424	8,152
Accrued compensation and payroll taxes	1,127	1,430
Debt facility	12,512	10,991
Total current liabilities	25,363	23,173
Long-term lease obligation	21	25
Debt facility, net of current portion	2,462	3,726
Deferred income tax liability	3,404	3,404
Total liabilities	31,250	30,328
Stockholders' equity:
Common stock, $0.001 par value; 500,000,000 shares authorized; 208,341,530 and 163,614,297 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	208	164
Additional paid-in capital	313,097	298,715
Accumulated other comprehensive income/(loss)	7	(17)
Accumulated deficit	(296,886)	(274,973)
Total stockholders' equity	16,426	23,889
Total liabilities and stockholders' equity	$ 47,676	$ 54,217