Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	[1]
Current assets:
Cash and cash equivalents	$ 75,015	$ 75,383
Short-term investments	111,391	58,593
Accounts receivable	167	10,796
Unbilled license revenue	5,000
Prepaid expenses and other current assets	7,749	4,940
Total current assets	199,322	149,712
Property and equipment, net	5,996	8,032
Other assets	1,350	159
Total assets	206,668	157,903
Current liabilities:
Accounts payable	2,269	3,933
Accrued compensation and benefits	2,306	3,229
Uncharged license fees	1,000
Accrued and other liabilities	9,974	10,709
Total current liabilities	15,549	17,871
Loan payable, long term	49,020
Other long-term liabilities	651	720
Total liabilities	65,220	18,591
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively.
Common stock, $0.0001 par value; 300,000,000 shares authorized; 62,106,121 and 47,534,979 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively.	6	5
Additional paid-in capital	479,109	417,568
Accumulated deficit	(337,650)	(278,214)
Accumulated other comprehensive loss	(17)	(47)
Total stockholders' equity	141,448	139,312
Total liabilities and stockholders' equity	$ 206,668	$ 157,903

[1] Derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10K for the year ended December 31, 2017.