CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 885,562	$ 46,535
Short-term investments	504,544	368,515
Other current assets	13,537	9,357
Total current assets	1,403,643	424,407
Property and equipment, net	7,809	1,776
Long-term investment	15,629	0
Right-of-use asset	39,890	582
Other long-term assets	9,157	5,435
Total assets	1,476,128	432,200
Current liabilities
Accounts payable and accrued liabilities	71,472	48,082
Deferred revenue and other current liabilities	0	824
Total current liabilities	71,472	48,906
Lease liability	41,905	0
Other liabilities	1,962	999
Total liabilities	115,339	49,905
Commitments and contingencies (see Note 15)
Shareholders' equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; none issued and outstanding at both December 31, 2020 and December 31, 2019	0	0
Common stock, $0.001 par value; 100,000,000 authorized; 50,439,069 and 39,517,329 issued and outstanding at December 31, 2020 and December 31, 2019, respectively	50	40
Additional paid-in capital	2,481,218	1,144,667
Accumulated other comprehensive income	9,759	9,889
Accumulated deficit	(1,130,238)	(772,301)
Total shareholders' equity	1,360,789	382,295
Total liabilities and shareholders' equity	$ 1,476,128	$ 432,200