Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 23,018	$ 31,213
Short-term investments	61,932	88,914
Restricted cash		50
Prepaid and other current assets	4,188	3,814
Total current assets	89,138	123,991
Other assets, noncurrent	257	543
Right-of-use assets	2,058
Property and equipment, net	339	386
Total assets	91,792	124,920
Current liabilities:
Accounts payable	2,123	1,248
Accrued compensation	1,576	1,495
Other accrued liabilities	4,906	2,043
Deferred rent, current portion		15
Operating lease liability	472
Total current liabilities	9,077	4,801
Operating lease liability, noncurrent	1,443
Deferred rent, noncurrent portion		174
Total liabilities	10,520	4,975
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized; zero shares issued and outstanding
Common stock, $0.001 par value, 100,000,000 shares authorized; 12,029,992 and 11,954,528 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	12	12
Additional paid-in capital	326,139	323,279
Accumulated other comprehensive income (loss)	31	(4)
Accumulated deficit	(244,910)	(203,342)
Total stockholders’ equity	81,272	119,945
Total liabilities and stockholders’ equity	$ 91,792	$ 124,920