CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 46,535	$ 32,694
Short-term investments	368,515	190,096
Other current assets	9,357	3,870
Total current assets	424,407	226,660
Property and equipment, net	1,776	473
Other long-term assets	6,017	1,321
Total assets	432,200	228,454
Current liabilities
Accounts payable and accrued liabilities	48,082	25,775
Deferred revenue and other current liabilities	824	371
Total current liabilities	48,906	26,146
Deferred revenue and other liabilities	999	732
Total liabilities	49,905	26,878
Stockholders' equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; none issued and outstanding at both December 31, 2019 and December 31, 2018	0	0
Common stock, $0.001 par value; 100,000,000 authorized; 39,517,329 and 32,538,857 issued and outstanding at December 31, 2019 and December 31, 2018, respectively	40	33
Additional paid-in capital	1,144,667	751,109
Accumulated other comprehensive income	9,889	9,479
Accumulated deficit	(772,301)	(559,045)
Total stockholders' equity	382,295	201,576
Total liabilities and stockholders' equity	$ 432,200	$ 228,454