Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Certain Unaudited Quarterly Financial Information

The following table presents certain unaudited quarterly financial information for the previous eight quarters. This information has been prepared on the same basis as the audited financial statements and includes all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the unaudited quarterly results of operations set forth herein.

	For the Three Months Ended(1)
	March 31			June 30			September 30			December 31
	(in thousands except per share data)
2019
Total revenue	$	2,780		$	27,666		$	4,208		$	39,338
Total costs and expenses	43,585			48,802			53,131			64,919
Loss from operations	(40,805		)	(21,136		)	(48,923		)	(25,581		)
Net loss	(38,053		)	(17,862		)	(45,369		)	(23,575		)
Net loss per share- basic and diluted	$	(0.74	)	$	(0.34	)	$	(0.86	)	$	(0.44	)
2018
Total revenue	$	3,232		$	3,685		$	3,258		$	3,816
Total costs and expenses	30,872			33,591			33,320			40,622
Loss from operations	(27,640		)	(29,906		)	(30,062		)	(36,806		)
Net income (loss)	(26,219		)	(28,938		)	(28,979		)	(34,734		)
Net loss per share- basic and diluted	$	(0.58	)	$	(0.63	)	$	(0.63	)	$	(0.75	)

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(1)

The amounts were computed independently for each quarter, and the sum of the quarters may not total the annual amounts.