Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies

Schedule of computation of basic and diluted earnings per share

	Year Ended December 31,
		2018		2017		2016
Basic and diluted net loss per share of common stock:
Net loss	$	(36,726)	$	(18,898)	$	(28,643)
Weighted average shares of common stock outstanding		40,895,406		23,540,748		19,498,143
Net loss per share of common stock—basic and diluted	$	(0.90)	$	(0.80)	$	(1.47)

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

	December 31,
	2018	2017
Restricted stock	105,200	239,800
Stock options	4,951,409	3,754,320
	5,056,609	3,994,120