Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Data [Abstract]

Selected Quarterly Financial Data (Unaudited)

Selected Quarterly Financial Data (Unaudited)

The following information has been derived from unaudited consolidated financial statements that, in the opinion of management, include all recurring adjustments necessary for a fair statement of such information:

	Three Months Ended
(in thousands except per share data)	Dec 31, 2019		Sep 30, 2019		Jun 30, 2019		Mar 31, 2019		Dec 31, 2018		Sep 30, 2018		Jun 30, 2018		Mar 31, 2018
Statements of Operations Data:
Revenues	$	—	$	—	$	25,000	$	—	$	—	$	—	$	—	$	—
Loss from operations	(70,373)		(58,353)		(22,975)		(49,025)		(33,830)		(25,889)		(22,429)		(21,951)
Net loss	(67,216)		(56,196)		(21,460)		(47,384)		(32,299)		(24,435)		(21,690)		(21,430)
Net loss per share—basic and diluted	$	(1.31)	$	(1.28)	$	(0.56)	$	(1.25)	$	(0.86)	$	(0.65)	$	(0.65)	$	(0.66)