CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 29,757	$ 22,383
Short-term investments	75,703	34,351
Other current assets	2,465	2,821
Total current assets	107,925	59,555
Property and equipment, net	638	629
Other long-term assets	2,202	3,260
Total assets	110,765	63,444
Current liabilities
Accounts payable and accrued liabilities	11,282	15,002
Total current liabilities	11,282	15,002
Other liability	367	133
Total liabilities	11,649	15,135
Stockholders’ equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; none issued and outstanding at both March 31, 2017 and December 31, 2016	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized; 24,939,797 and 19,937,095 issued and outstanding at March 31, 2017 and December 31, 2016, respectively	25	20
Additional paid-in capital	497,531	428,507
Accumulated other comprehensive income	9,604	9,533
Accumulated deficit	(408,044)	(389,751)
Total stockholders’ equity	99,116	48,309
Total liabilities and stockholders’ equity	$ 110,765	$ 63,444