Selected quarterly financial data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

The following table contains quarterly financial information for 2019 and 2018. The Company believes that the following information reflects all normal recurring adjustments necessary for a fair presentation of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.

	2019
	First quarter		Second quarter		Third quarter		Fourth quarter		Total
	(in thousands, except per share data)
Total revenues	$	12,471	$	13,296	$	8,910	$	9,997	$	44,674
Total operating expenses	183,645		215,998		219,326		240,531		859,500
Loss from operations	(171,174)		(202,702)		(210,416)		(230,534)		(814,826)
Net loss	(164,446)		(195,782)		(206,033)		(223,347)		(789,608)
Net loss per share applicable to common stockholders - basic and diluted	$	(2.99)	$	(3.55)	$	(3.73)	$	(4.04)	$	(14.31)

	2018
	First quarter		Second quarter		Third quarter		Fourth quarter		Total
	(in thousands, except per share data)
Total revenues	$	15,957	$	7,851	$	11,528	$	19,243	$	54,579
Total operating expenses	132,586		156,465		161,347		176,204		626,602
Loss from operations	(116,629)		(148,614)		(149,819)		(156,961)		(572,023)
Net loss	(115,126)		(145,996)		(145,480)		(149,023)		(555,625)
Net loss per share applicable to common stockholders - basic and diluted	$	(2.31)	$	(2.91)	$	(2.73)	$	(2.72)	$	(10.68)