Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Net Loss Per Share

Schedule of basic and diluted net loss per share

	Year Ended		Year Ended
	December 31,		December 31,
	2018		2017
Numerator:
Net loss	$	(23,138)	$	(29,727)
Accretion of preferred stock to redemption value		—		(244)
Net loss attributable to common stockholders for basic loss per share	$	(23,138)	$	(29,971)
Less change in fair value of warrant liability		7,284		473
Net loss attributable to common stockholders for diluted loss per share	$	(30,422)	$	(30,444)
Denominator:
Weighted average number of common shares outstanding-basic		14,144,287		9,161,844
Assumed conversion of dilutive securities:
Private Placement Warrants		268,408		26,743
Denominator for diluted loss per share-adjusted weighted average shares		14,412,695		9,188,587
Net loss per share attributable to common stockholders-basic	$	(1.64)	$	(3.27)
Net loss per share attributable to common stockholders-diluted	$	(2.11)	$	(3.31)

Schedule of potentially anti-dilutive securities excluded from calculation of diluted net loss per share

	Year Ended December 31,
	2018	2017
Options to purchase common stock	2,761,912	2,257,621
Warrants assumed from Macrocure	54,516	54,516
	2,816,428	2,312,137