Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 19,377	$ 16,756
Other current assets	303	169
Total current assets	19,680	16,925
Property and equipment, net	29	29
Other assets	831	130
Total assets	20,540	17,084
Current liabilities:
Accounts payable	725	597
Accrued compensation and employee benefits	141	459
Accrued expenses and other liabilities	351	446
Total current liabilities	1,217	1,502
Deferred rent, net of current portion	2	1
Total liabilities	1,219	1,503
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 100 million shares authorized at June 30, 2014 and December 31, 2013; 21,010,815 and 15,685,562 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	21	16
Additional paid-in capital	99,027	90,498
Accumulated deficit	(79,727)	(74,933)
Total stockholders’ equity	19,321	15,581
Total liabilities and stockholders’ equity	$ 20,540	$ 17,084