Selected Quarterly Financial Information (unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Information (unaudited)

Selected Quarterly Financial Information (unaudited)

The following is a summary of the quarterly results of operations for the years ended December 31, 2019 and 2018:

	2019
	March 31			June 30			September 30			December 31
Research and development expenses	7,685			10,009			10,383			11,567
General and administrative expenses	5,481			5,198			4,674			6,275
Loss from operations	(13,166		)	(15,207		)	(15,057		)	(17,842		)
Net income (loss) attributable to common stockholders	$	(12,501	)	$	(14,443	)	$	(14,437	)	$	(17,478	)
Basic earnings (loss) per common share	$	(0.30	)	$	(0.35	)	$	(0.35	)	$	(0.39	)
Diluted earnings (loss) per common share	$	(0.30	)	$	(0.35	)	$	(0.35	)	$	(0.39	)

	2018
	March 31			June 30			September 30			December 31
Research and development expenses	7,686			8,516			9,407			16,128
General and administrative expenses	5,645			6,332			5,968			5,667
Income (loss) from operations	(13,331		)	(14,848		)	(15,375		)	(21,795		)
Net income (loss) attributable to common stockholders	$	(13,073	)	$	(13,209	)	$	(14,745	)	$	104,114
Basic earnings (loss) per common share	$	(0.36	)	$	(0.37	)	$	(0.41	)	$	2.62
Diluted earnings (loss) per common share	$	(0.36	)	$	(0.37	)	$	(0.41	)	$	2.62