BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 12,184	$ 15,354
Other current assets	490	134
Total current assets	12,674	15,488
Property and equipment, net	34	36
Other assets	553	608
Total assets	13,261	16,132
Current liabilities:
Accounts payable	651	795
Accrued compensation and employee benefits	123	329
Accrued expenses and other liabilities	359	264
Total current liabilities	1,133	1,388
Deferred rent, net of current portion	1	3
Total liabilities	1,134	1,391
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value; 100 million shares authorized at March 31, 2015 and December 31, 2014; 21,198,411 and 21,150,486 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	21	21
Additional paid-in capital	99,472	99,342
Accumulated deficit	(87,366)	(84,622)
Total stockholders’ equity	12,127	14,741
Total liabilities and stockholders’ equity	$ 13,261	$ 16,132