Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 61,147	$ 24,340
Short-term investment securities	104,231	83,637
Other current assets	3,958	3,873
Total current assets	169,336	111,850
Long-term investment securities	4,000	24,983
Property and equipment, net	4,675	6,270
Other long-term assets	1,520	1,811
Total assets	179,531	144,914
Current liabilities:
Accounts payable and accrued liabilities	17,420	13,510
Obligation due to licensor	3,709
Accrued compensation and benefits	2,057	4,007
Total current liabilities	23,186	17,517
Term loan, net of discount	29,838	29,517
Other long-term liabilities	11,628	3,110
Total liabilities	64,652	50,144
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.0001 par; 10,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.0001 par; 150,000,000 shares authorized; 56,237,915 and 41,665,779 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	6	4
Additional paid-in capital	435,061	346,549
Accumulated other comprehensive loss	(91)	(123)
Accumulated deficit	(320,097)	(251,660)
Total stockholders’ equity	114,879	94,770
Total liabilities and stockholders’ equity	$ 179,531	$ 144,914