CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 131,689	$ 46,535
Short-term investments	514,021	368,515
Other current assets	8,327	9,357
Total current assets	654,037	424,407
Property and equipment, net	3,187	1,776
Other long-term assets	6,726	6,017
Total assets	663,950	432,200
Current liabilities
Accounts payable and accrued liabilities	56,843	48,082
Deferred revenue and other current liabilities	852	824
Total current liabilities	57,695	48,906
Other long-term liabilities	1,251	999
Total liabilities	58,946	49,905
Commitments and contingencies (see Note 11)
Shareholders’ equity
Preferred stock, $0.001 par value; 10,000,000 shares authorized; none issued and outstanding at both June 30, 2020 and December 31, 2019	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized; 44,482,308 and 39,517,329 issued and outstanding at June 30, 2020 and December 31, 2019, respectively	45	40
Additional paid-in capital	1,535,490	1,144,667
Accumulated other comprehensive income	11,284	9,889
Accumulated deficit	(941,815)	(772,301)
Total shareholders’ equity	605,004	382,295
Total liabilities and shareholders’ equity	$ 663,950	$ 432,200