CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 91,904	$ 32,694
Short-term investments	362,308	190,096
Other current assets	10,436	3,870
Total current assets	464,648	226,660
Property and equipment, net	536	473
Other long-term assets	5,514	1,321
Total assets	470,698	228,454
Current liabilities
Accounts payable and accrued liabilities	34,689	25,775
Deferred revenue and other current liabilities	647	371
Total current liabilities	35,336	26,146
Deferred revenue and other liabilities	873	732
Total liabilities	36,209	26,878
Commitments and contingencies (see Note 11)
Stockholders’ equity
Preferred stock, $0.001 par value; 10,000,000 shares authorized; none issued and outstanding at both September 30, 2019 and December 31, 2018	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized; 39,367,683 and 32,538,857 issued and outstanding at September 30, 2019 and December 31, 2018, respectively	39	33
Additional paid-in capital	1,124,484	751,109
Accumulated other comprehensive income	9,891	9,479
Accumulated deficit	(699,925)	(559,045)
Total stockholders’ equity	434,489	201,576
Total liabilities and stockholders’ equity	$ 470,698	$ 228,454