CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 20,784	$ 22,383
Short-term investments	54,178	34,351
Other current assets	4,439	2,821
Total current assets	79,401	59,555
Property and equipment, net	571	629
Other long-term assets	2,089	3,260
Total assets	82,061	63,444
Current liabilities
Accounts payable and accrued liabilities	13,580	15,002
Total current liabilities	13,580	15,002
Other liability	329	133
Total liabilities	13,909	15,135
Stockholders’ equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; none issued and outstanding at both September 30, 2017 and December 31, 2016	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,977,720 and 19,937,095 issued and outstanding at September 30, 2017 and December 31, 2016, respectively	25	20
Additional paid-in capital	501,346	428,507
Accumulated other comprehensive income	9,514	9,533
Accumulated deficit	(442,733)	(389,751)
Total stockholders’ equity	68,152	48,309
Total liabilities and stockholders’ equity	$ 82,061	$ 63,444