Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 27,624	$ 125,206
Short-term investments	182,686	143,685
Accounts receivable	9,156	1,112
Contract assets	5,876	0
Prepaid and other current assets	1,927	4,292
Total current assets	227,269	274,295
Long-term investments	0	16,518
Property and equipment, net	2,687	3,568
Other assets	323	429
Total assets	230,279	294,810
Current liabilities:
Accounts payable	2,024	5,253
Accrued liabilities	15,652	17,392
Deferred revenue, current	0	9,572
Current portion of long-term debt	3,778	0
Other current liabilities	38	227
Total current liabilities	21,492	32,444
Long-term debt, net	38,127	31,777
Liability related to the sale of future royalties, net	117,718	104,650
Deferred revenue, non-current	0	15,000
Other long-term liabilities	873	1,097
Total liabilities	178,210	184,968
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred stock, $0.001 par value	0	0
Common stock, $0.001 par value	55	54
Additional paid-in capital	765,970	755,526
Accumulated other comprehensive income	447	343
Accumulated deficit	(714,403)	(646,081)
Total stockholders’ equity	52,069	109,842
Total liabilities and stockholders’ equity	$ 230,279	$ 294,810