Selected Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Results from Operations

Selected quarterly results from operations for the years ended December 31, 2017 and 2016 are as follows (in thousands except per share amounts):

	2017 Quarter Ended
	March 31			June 30			September 30			December 31
Revenue	$	8,230		$	8,937		$	9,029		$	56,301
Net income (loss)	$	(5,996	)	$	(9,240	)	$	(6,560	)	$	39,655
Basic net income (loss) per share	$	(0.12	)	$	(0.19	)	$	(0.13	)	$	0.81
Diluted net income (loss) per share	$	(0.12	)	$	(0.19	)	$	(0.13	)	$	0.80
	2016 Quarter Ended
	March 31			June 30			September 30			December 31
Revenue	$	—		$	2,795		$	4,251		$	4,889
Net loss	$	(15,243	)	$	(9,983	)	$	(7,072	)	$	(7,665	)
Basic net loss per share	$	(0.34	)	$	(0.22	)	$	(0.15	)	$	(0.16	)
Diluted net loss per share	$	(0.34	)	$	(0.22	)	$	(0.15	)	$	(0.16	)