CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Revenue
License and collaboration revenues	$ 267	$ 1,244
Total revenue	267	1,244
Operating expenses
Research and development	71,708	34,240
General and administrative	18,046	9,762
Total operating expenses	89,754	44,002
Loss from operations	(89,487)	(42,758)
Other income, net	2,832	1,846
Net loss	(86,655)	(40,912)
Unrealized gain (loss) on available-for-sale investments	(182)	158
Comprehensive loss	$ (86,837)	$ (40,754)
Basic and diluted net loss per share (USD per share)	$ (2.02)	$ (1.17)
Weighted average number of shares used in computing net loss per share, basic and diluted (shares)	42,886,691	34,980,361

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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