Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 31,462	$ 47,990
Restricted cash		250
Receivables	150	1,058
Prepaid and other current assets	3,634	1,207
Total current assets	35,246	50,505
Property and equipment, net	299	502
Other assets	81	2,956
Total assets	35,626	53,963
Current liabilities:
Accounts payable	1,789	2,706
Accrued clinical and cost of other studies	4,315	2,070
Accrued compensation	1,159	819
Deferred revenue-related party		790
Deferred rent	37
Facility lease exit obligation	104	193
Other accrued liabilities	112	191
Total current liabilities	7,516	6,769
Accrued clinical and cost of other studies, non-current		33
Deferred rent, non-current		97
Facility lease exit obligation, non-current		104
Deferred revenue- related party, non-current	5,000	7,845
Total liabilities	$ 12,516	$ 14,848
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, 5,000,000 shares authorized, none outstanding
Common stock, no par value; authorized shares: 25,045,765 at December 31, 2015 and December 31, 2014; issued and outstanding shares:14,761,351 at December 31, 2015; 14,726,960 at December 31, 2014	$ 428,591	$ 427,387
Accumulated deficit	(405,481)	(388,272)
Total shareholders' equity	23,110	39,115
Total liabilities and shareholders' equity	$ 35,626	$ 53,963