CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 13,379	$ 6,593
Short-term investments	45,498	22,710
Other current assets	2,016	3,354
Total current assets	60,893	32,657
Property and equipment, net	693	496
Other long-term assets	288	326
Total assets	61,874	33,479
Current liabilities
Accounts payable and accrued liabilities	7,096	5,396
Total current liabilities	7,096	5,396
Other liability	58	21
Total liabilities	7,154	5,417
Stockholders’ equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; none issued and outstanding at both June 30, 2015 and December 31, 2014	0	0
Common stock, $0.001 par value; 100,000,000 authorized; 16,347,948 and 13,566,726 issued and outstanding at June 30, 2015 and December 31, 2014, respectively	16	14
Additional paid-in capital	314,664	260,616
Accumulated other comprehensive income	9,515	9,521
Accumulated deficit	(269,475)	(242,089)
Total stockholders’ equity	54,720	28,062
Total liabilities and stockholders’ equity	$ 61,874	$ 33,479