Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Significant Accounting Policies

Schedule of computation of basic and diluted earnings per share

	Year Ended December 31,
		2017		2016		2015
Basic and diluted net loss per share of common stock:
Net loss	$	(18,898)	$	(28,643)	$	(24,850)
Weighted average shares of common stock outstanding		23,540,748		19,498,143		14,919,783
Net loss per share of common stock—basic and diluted	$	(0.80)	$	(1.47)	$	(1.67)

Schedule of antidilutive securities excluded from the computation of diluted weighted average shares outstanding

	December 31,
	2017	2016	2015
Restricted stock	239,800	195,900	—
Stock options	3,754,320	2,239,044	1,799,226
	3,994,120	2,434,944	1,799,226