CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 131,434	$ 46,535
Short-term investments	447,616	368,515
Other current assets	16,341	9,357
Total current assets	595,391	424,407
Property and equipment, net	5,901	1,776
Long-term investment	11,400	0
Other long-term assets	7,159	6,017
Total assets	619,851	432,200
Current liabilities
Accounts payable and accrued liabilities	66,670	48,082
Deferred revenue and other current liabilities	697	824
Total current liabilities	67,367	48,906
Other long-term liabilities	1,541	999
Total liabilities	68,908	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 September 30, 2020 and December 31, 2019	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized; 44,754,466 and 39,517,329 issued and outstanding at September 30, 2020 and December 31, 2019, respectively	45	40
Additional paid-in capital	1,569,592	1,144,667
Accumulated other comprehensive income	10,457	9,889
Accumulated deficit	(1,029,151)	(772,301)
Total shareholders’ equity	550,943	382,295
Total liabilities and shareholders’ equity	$ 619,851	$ 432,200